NUM

cbfa_bbfa

Three-Point Test Cross Problem

A test cross is a way to explore the relationship between genes and their respective alleles. It is a useful tool for genetic mapping and deciphering the inheritance of traits. Specifically, a three-point test cross examines three (3) genes at the same time to learn about their assortment in gamete formation.

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene E is analogous to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene K is connected with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene M is connected with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

Phenotype	Genotypes			Progeny Count
eery, kidney, mushy	e	k	m	40
eery, kidney	e	k	+	2,747
eery, mushy	e	+	m	504
eery	e	+	+	1,078
kidney, mushy	+	k	m	1,034
kidney	+	k	+	464
mushy	+	+	m	2,885
wildtype	+	+	+	48
TOTAL =				8,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes M and K during meiosis.

calculate the genetic distance between the two genes M and K, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

9c33_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene E is connected with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene F is related to the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene J is linked with the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.

Phenotype	Genotypes			Progeny Count
eery, fuzzy, jerky	e	f	j	229
eery, fuzzy	e	f	+	19
eery, jerky	e	+	j	826
eery	e	+	+	3,180
fuzzy, jerky	+	f	j	3,078
fuzzy	+	f	+	812
jerky	+	+	j	23
wildtype	+	+	+	233
TOTAL =				8,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes E and J during meiosis.

calculate the genetic distance between the two genes E and J, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

851d_c36d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene M is affiliated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene W is related to the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.
Gene X is correlated with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
mushy, waxy, xanthic	m	w	x	598
mushy, waxy	m	w	+	422
mushy, xanthic	m	+	x	3,745
mushy	m	+	+	41
waxy, xanthic	+	w	x	56
waxy	+	w	+	3,724
xanthic	+	+	x	451
wildtype	+	+	+	663
TOTAL =				9,700

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes M and W during meiosis.

calculate the genetic distance between the two genes M and W, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

22.00000000 0.10000000 NUM

c171_69f9

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene M is connected with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene W is related to the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.
Gene X is related to the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
mushy, waxy, xanthic	m	w	x	24
mushy, waxy	m	w	+	182
mushy, xanthic	m	+	x	464
mushy	m	+	+	3,516
waxy, xanthic	+	w	x	3,498
waxy	+	w	+	502
xanthic	+	+	x	196
wildtype	+	+	+	18
TOTAL =				8,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes W and X during meiosis.

calculate the genetic distance between the two genes W and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

16.00000000 0.10000000 NUM

9fdc_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene E is analogous to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene K is correlated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene N is affiliated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.

Phenotype	Genotypes			Progeny Count
eery, kidney, nerdy	e	k	n	779
eery, kidney	e	k	+	60
eery, nerdy	e	+	n	343
eery	e	+	+	2,982
kidney, nerdy	+	k	n	3,024
kidney	+	k	+	371
nerdy	+	+	n	66
wildtype	+	+	+	775
TOTAL =				8,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes E and K during meiosis.

calculate the genetic distance between the two genes E and K, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

fc81_a9f1

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene J is related to the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene K is correlated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene R is correlated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
jerky, kidney, rusty	j	k	r	1,301
jerky, kidney	j	k	+	459
jerky, rusty	j	+	r	8
jerky	j	+	+	53
kidney, rusty	+	k	r	73
kidney	+	k	+	10
rusty	+	+	r	423
wildtype	+	+	+	1,273
TOTAL =				3,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes J and R during meiosis.

calculate the genetic distance between the two genes J and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

28.00000000 0.10000000 NUM

024d_2048

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene H is analogous to the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene M is associated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene R is correlated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
horsey, mushy, rusty	h	m	r	1,240
horsey, mushy	h	m	+	150
horsey, rusty	h	+	r	8
horsey	h	+	+	202
mushy, rusty	+	m	r	166
mushy	+	m	+	8
rusty	+	+	r	154
wildtype	+	+	+	1,272
TOTAL =				3,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes H and R during meiosis.

calculate the genetic distance between the two genes H and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

21.00000000 0.10000000 NUM

9e58_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is linked with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene H is connected with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene X is analogous to the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
bumpy, horsey, xanthic	b	h	x	2,716
bumpy, horsey	b	h	+	53
bumpy, xanthic	b	+	x	1,196
bumpy	b	+	+	208
horsey, xanthic	+	h	x	212
horsey	+	h	+	1,240
xanthic	+	+	x	31
wildtype	+	+	+	2,744
TOTAL =				8,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes X and H during meiosis.

calculate the genetic distance between the two genes X and H, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

8630_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene F is affiliated with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene W is linked with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.
Gene Y is related to the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
fuzzy, waxy, yucky	f	w	y	3,001
fuzzy, waxy	f	w	+	112
fuzzy, yucky	f	+	y	24
fuzzy	f	+	+	1,274
waxy, yucky	+	w	y	1,322
waxy	+	w	+	20
yucky	+	+	y	108
wildtype	+	+	+	2,939
TOTAL =				8,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes F and W during meiosis.

calculate the genetic distance between the two genes F and W, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

1006_1506

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene F is related to the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene M is connected with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene N is linked with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.

Phenotype	Genotypes			Progeny Count
fuzzy, mushy, nerdy	f	m	n	188
fuzzy, mushy	f	m	+	862
fuzzy, nerdy	f	+	n	296
fuzzy	f	+	+	21
mushy, nerdy	+	m	n	21
mushy	+	m	+	334
nerdy	+	+	n	888
wildtype	+	+	+	190
TOTAL =				2,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes F and M during meiosis.

calculate the genetic distance between the two genes F and M, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

24.00000000 0.10000000 NUM

92d0_a9f1

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is correlated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene F is related to the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene K is associated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.

Phenotype	Genotypes			Progeny Count
dewy, fuzzy, kidney	d	f	k	24
dewy, fuzzy	d	f	+	1,800
dewy, kidney	d	+	k	659
dewy	d	+	+	95
fuzzy, kidney	+	f	k	113
fuzzy	+	f	+	745
kidney	+	+	k	1,736
wildtype	+	+	+	28
TOTAL =				5,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and K during meiosis.

calculate the genetic distance between the two genes D and K, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

28.00000000 0.10000000 NUM

9fb8_935f

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is analogous to the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene P is correlated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene W is correlated with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
artsy, prickly, waxy	a	p	w	672
artsy, prickly	a	p	+	164
artsy, waxy	a	+	w	17
artsy	a	+	+	2,645
prickly, waxy	+	p	w	2,640
prickly	+	p	+	18
waxy	+	+	w	151
wildtype	+	+	+	693
TOTAL =				7,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes W and P during meiosis.

calculate the genetic distance between the two genes W and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

5.00000000 0.10000000 NUM

373f_e6c1

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is related to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene T is linked with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.
Gene Y is correlated with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
chummy, tipsy, yucky	c	t	y	213
chummy, tipsy	c	t	+	406
chummy, yucky	c	+	y	5
chummy	c	+	+	17
tipsy, yucky	+	t	y	22
tipsy	+	t	+	8
yucky	+	+	y	400
wildtype	+	+	+	229
TOTAL =				1,300

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes T and Y during meiosis.

calculate the genetic distance between the two genes T and Y, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

37.00000000 0.10000000 NUM

80fa_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene H is affiliated with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene N is correlated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene R is linked with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
horsey, nerdy, rusty	h	n	r	653
horsey, nerdy	h	n	+	67
horsey, rusty	h	+	r	239
horsey	h	+	+	1,931
nerdy, rusty	+	n	r	1,926
nerdy	+	n	+	254
rusty	+	+	r	78
wildtype	+	+	+	652
TOTAL =				5,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes H and N during meiosis.

calculate the genetic distance between the two genes H and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

086e_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is affiliated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene C is correlated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene K is affiliated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.

Phenotype	Genotypes			Progeny Count
artsy, chummy, kidney	a	c	k	743
artsy, chummy	a	c	+	562
artsy, kidney	a	+	k	101
artsy	a	+	+	1,781
chummy, kidney	+	c	k	1,931
chummy	+	c	+	91
kidney	+	+	k	526
wildtype	+	+	+	665
TOTAL =				6,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes K and C during meiosis.

calculate the genetic distance between the two genes K and C, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

35a5_2048

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is associated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene B is analogous to the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene E is affiliated with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.

Phenotype	Genotypes			Progeny Count
artsy, bumpy, eery	a	b	e	2,968
artsy, bumpy	a	b	+	843
artsy, eery	a	+	e	54
artsy	a	+	+	333
bumpy, eery	+	b	e	381
bumpy	+	b	+	72
eery	+	+	e	795
wildtype	+	+	+	2,954
TOTAL =				8,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes B and E during meiosis.

calculate the genetic distance between the two genes B and E, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

21.00000000 0.10000000 NUM

eb0d_116e

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene E is analogous to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene J is affiliated with the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene K is linked with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.

Phenotype	Genotypes			Progeny Count
eery, jerky, kidney	e	j	k	50
eery, jerky	e	j	+	148
eery, kidney	e	+	k	289
eery	e	+	+	7
jerky, kidney	+	j	k	8
jerky	+	j	+	316
kidney	+	+	k	137
wildtype	+	+	+	45
TOTAL =				1,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes K and J during meiosis.

calculate the genetic distance between the two genes K and J, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

11.00000000 0.10000000 NUM

71de_8adc

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene E is connected with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene H is affiliated with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene P is related to the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
eery, horsey, prickly	e	h	p	2,159
eery, horsey	e	h	+	143
eery, prickly	e	+	p	433
eery	e	+	+	863
horsey, prickly	+	h	p	901
horsey	+	h	+	395
prickly	+	+	p	109
wildtype	+	+	+	2,197
TOTAL =				7,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes P and H during meiosis.

calculate the genetic distance between the two genes P and H, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

15.00000000 0.10000000 NUM

52f2_e6c1

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene M is connected with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene W is connected with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.
Gene Y is correlated with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
mushy, waxy, yucky	m	w	y	299
mushy, waxy	m	w	+	15
mushy, yucky	m	+	y	34
mushy	m	+	+	567
waxy, yucky	+	w	y	540
waxy	+	w	+	29
yucky	+	+	y	12
wildtype	+	+	+	304
TOTAL =				1,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes M and Y during meiosis.

calculate the genetic distance between the two genes M and Y, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

37.00000000 0.10000000 NUM

0003_2048

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is associated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene N is analogous to the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene R is analogous to the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
dewy, nerdy, rusty	d	n	r	308
dewy, nerdy	d	n	+	2,572
dewy, rusty	d	+	r	708
dewy	d	+	+	44
nerdy, rusty	+	n	r	64
nerdy	+	n	+	696
rusty	+	+	r	2,504
wildtype	+	+	+	304
TOTAL =				7,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and N during meiosis.

calculate the genetic distance between the two genes D and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

21.00000000 0.10000000 NUM

da90_8adc

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene K is associated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene X is connected with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.
Gene Y is related to the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
kidney, xanthic, yucky	k	x	y	966
kidney, xanthic	k	x	+	60
kidney, yucky	k	+	y	208
kidney	k	+	+	409
xanthic, yucky	+	x	y	375
xanthic	+	x	+	160
yucky	+	+	y	52
wildtype	+	+	+	970
TOTAL =				3,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes Y and X during meiosis.

calculate the genetic distance between the two genes Y and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

15.00000000 0.10000000 NUM

7ed1_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene E is analogous to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene H is correlated with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene R is correlated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
eery, horsey, rusty	e	h	r	535
eery, horsey	e	h	+	395
eery, rusty	e	+	r	1,358
eery	e	+	+	91
horsey, rusty	+	h	r	97
horsey	+	h	+	1,415
rusty	+	+	r	357
wildtype	+	+	+	452
TOTAL =				4,700

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes E and R during meiosis.

calculate the genetic distance between the two genes E and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

867e_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is connected with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene H is associated with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene X is related to the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
artsy, horsey, xanthic	a	h	x	1,840
artsy, horsey	a	h	+	141
artsy, xanthic	a	+	x	572
artsy	a	+	+	635
horsey, xanthic	+	h	x	636
horsey	+	h	+	513
xanthic	+	+	x	138
wildtype	+	+	+	1,725
TOTAL =				6,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and X during meiosis.

calculate the genetic distance between the two genes A and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

06d5_05e4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is related to the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene B is linked with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene W is linked with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
artsy, bumpy, waxy	a	b	w	71
artsy, bumpy	a	b	+	217
artsy, waxy	a	+	w	2,428
artsy	a	+	+	1,085
bumpy, waxy	+	b	w	1,071
bumpy	+	b	+	2,500
waxy	+	+	w	245
wildtype	+	+	+	83
TOTAL =				7,700

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and W during meiosis.

calculate the genetic distance between the two genes A and W, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

34.00000000 0.10000000 NUM

00b6_b29b

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene K is associated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene N is analogous to the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene P is affiliated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
kidney, nerdy, prickly	k	n	p	20
kidney, nerdy	k	n	+	216
kidney, prickly	k	+	p	2,244
kidney	k	+	+	840
nerdy, prickly	+	n	p	777
nerdy	+	n	+	2,277
prickly	+	+	p	213
wildtype	+	+	+	13
TOTAL =				6,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes K and N during meiosis.

calculate the genetic distance between the two genes K and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

7.00000000 0.10000000 NUM

c9ac_f24b

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is analogous to the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene R is associated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.
Gene W is associated with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
dewy, rusty, waxy	d	r	w	69
dewy, rusty	d	r	+	2,517
dewy, waxy	d	+	w	644
dewy	d	+	+	372
rusty, waxy	+	r	w	343
rusty	+	r	+	643
waxy	+	+	w	2,488
wildtype	+	+	+	74
TOTAL =				7,150

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes W and R during meiosis.

calculate the genetic distance between the two genes W and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

12.00000000 0.10000000 NUM

db03_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is correlated with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene M is affiliated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene W is associated with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
bumpy, mushy, waxy	b	m	w	284
bumpy, mushy	b	m	+	231
bumpy, waxy	b	+	w	41
bumpy	b	+	+	829
mushy, waxy	+	m	w	823
mushy	+	m	+	43
waxy	+	+	w	245
wildtype	+	+	+	304
TOTAL =				2,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes W and M during meiosis.

calculate the genetic distance between the two genes W and M, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

a8f9_f623

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is analogous to the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene K is correlated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene R is affiliated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
artsy, kidney, rusty	a	k	r	3,389
artsy, kidney	a	k	+	45
artsy, rusty	a	+	r	196
artsy	a	+	+	1,088
kidney, rusty	+	k	r	1,074
kidney	+	k	+	180
rusty	+	+	r	49
wildtype	+	+	+	3,379
TOTAL =				9,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and K during meiosis.

calculate the genetic distance between the two genes A and K, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

27.00000000 0.10000000 NUM

f11c_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is affiliated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene M is linked with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene P is associated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
dewy, mushy, prickly	d	m	p	561
dewy, mushy	d	m	+	20
dewy, prickly	d	+	p	77
dewy	d	+	+	271
mushy, prickly	+	m	p	247
mushy	+	m	+	71
prickly	+	+	p	17
wildtype	+	+	+	586
TOTAL =				1,850

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and P during meiosis.

calculate the genetic distance between the two genes D and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

9e1e_b913

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene T is associated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.
Gene W is connected with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.
Gene X is connected with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
tipsy, waxy, xanthic	t	w	x	48
tipsy, waxy	t	w	+	389
tipsy, xanthic	t	+	x	1,257
tipsy	t	+	+	2,688
waxy, xanthic	+	w	x	2,680
waxy	+	w	+	1,295
xanthic	+	+	x	403
wildtype	+	+	+	40
TOTAL =				8,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes W and X during meiosis.

calculate the genetic distance between the two genes W and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

38.00000000 0.10000000 NUM

5bdd_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is analogous to the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene E is connected with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene T is associated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
bumpy, eery, tipsy	b	e	t	345
bumpy, eery	b	e	+	19
bumpy, tipsy	b	+	t	148
bumpy	b	+	+	44
eery, tipsy	+	e	t	44
eery	+	e	+	149
tipsy	+	+	t	14
wildtype	+	+	+	337
TOTAL =				1,100

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes T and E during meiosis.

calculate the genetic distance between the two genes T and E, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

3c32_f24b

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene N is related to the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene W is analogous to the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.
Gene X is correlated with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
nerdy, waxy, xanthic	n	w	x	232
nerdy, waxy	n	w	+	294
nerdy, xanthic	n	+	x	33
nerdy	n	+	+	1,499
waxy, xanthic	+	w	x	1,630
waxy	+	w	+	30
xanthic	+	+	x	273
wildtype	+	+	+	209
TOTAL =				4,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes N and X during meiosis.

calculate the genetic distance between the two genes N and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

12.00000000 0.10000000 NUM

410d_4725

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene E is connected with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene J is affiliated with the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene M is analogous to the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

Phenotype	Genotypes			Progeny Count
eery, jerky, mushy	e	j	m	680
eery, jerky	e	j	+	1,518
eery, mushy	e	+	m	133
eery	e	+	+	47
jerky, mushy	+	j	m	45
jerky	+	j	+	143
mushy	+	+	m	1,426
wildtype	+	+	+	608
TOTAL =				4,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes E and J during meiosis.

calculate the genetic distance between the two genes E and J, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

8.00000000 0.10000000 NUM

9423_a9f1

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is connected with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene C is associated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene Y is correlated with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
artsy, chummy, yucky	a	c	y	134
artsy, chummy	a	c	+	2,268
artsy, yucky	a	+	y	35
artsy	a	+	+	940
chummy, yucky	+	c	y	896
chummy	+	c	+	33
yucky	+	+	y	2,356
wildtype	+	+	+	138
TOTAL =				6,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and A during meiosis.

calculate the genetic distance between the two genes C and A, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

28.00000000 0.10000000 NUM

471f_116e

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is related to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene X is related to the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.
Gene Y is analogous to the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
chummy, xanthic, yucky	c	x	y	2,885
chummy, xanthic	c	x	+	498
chummy, yucky	c	+	y	59
chummy	c	+	+	350
xanthic, yucky	+	x	y	372
xanthic	+	x	+	55
yucky	+	+	y	528
wildtype	+	+	+	2,853
TOTAL =				7,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and X during meiosis.

calculate the genetic distance between the two genes C and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

11.00000000 0.10000000 NUM

0f18_2048

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is related to the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene P is related to the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene R is correlated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
artsy, prickly, rusty	a	p	r	2,905
artsy, prickly	a	p	+	262
artsy, rusty	a	+	r	544
artsy	a	+	+	41
prickly, rusty	+	p	r	33
prickly	+	p	+	492
rusty	+	+	r	256
wildtype	+	+	+	2,867
TOTAL =				7,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes P and R during meiosis.

calculate the genetic distance between the two genes P and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

21.00000000 0.10000000 NUM

6ba1_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is correlated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene X is associated with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.
Gene Y is associated with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
chummy, xanthic, yucky	c	x	y	117
chummy, xanthic	c	x	+	142
chummy, yucky	c	+	y	391
chummy	c	+	+	19
xanthic, yucky	+	x	y	20
xanthic	+	x	+	363
yucky	+	+	y	144
wildtype	+	+	+	104
TOTAL =				1,300

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes Y and X during meiosis.

calculate the genetic distance between the two genes Y and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

07f5_17ef

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene E is analogous to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene M is correlated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene P is affiliated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
eery, mushy, prickly	e	m	p	978
eery, mushy	e	m	+	2,562
eery, prickly	e	+	p	748
eery	e	+	+	142
mushy, prickly	+	m	p	125
mushy	+	m	+	765
prickly	+	+	p	2,600
wildtype	+	+	+	980
TOTAL =				8,900

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes E and P during meiosis.

calculate the genetic distance between the two genes E and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

39.00000000 0.10000000 NUM

0215_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is related to the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene M is connected with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene W is analogous to the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
dewy, mushy, waxy	d	m	w	354
dewy, mushy	d	m	+	81
dewy, waxy	d	+	w	24
dewy	d	+	+	968
mushy, waxy	+	m	w	950
mushy	+	m	+	18
waxy	+	+	w	101
wildtype	+	+	+	304
TOTAL =				2,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and M during meiosis.

calculate the genetic distance between the two genes D and M, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

76ad_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is affiliated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene F is related to the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene R is affiliated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
chummy, fuzzy, rusty	c	f	r	536
chummy, fuzzy	c	f	+	914
chummy, rusty	c	+	r	49
chummy	c	+	+	3,208
fuzzy, rusty	+	f	r	3,209
fuzzy	+	f	+	44
rusty	+	+	r	853
wildtype	+	+	+	487
TOTAL =				9,300

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and F during meiosis.

calculate the genetic distance between the two genes C and F, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

0fba_2420

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is related to the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene D is analogous to the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene K is associated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.

Phenotype	Genotypes			Progeny Count
artsy, dewy, kidney	a	d	k	39
artsy, dewy	a	d	+	294
artsy, kidney	a	+	k	139
artsy	a	+	+	702
dewy, kidney	+	d	k	726
dewy	+	d	+	113
kidney	+	+	k	342
wildtype	+	+	+	45
TOTAL =				2,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and K during meiosis.

calculate the genetic distance between the two genes A and K, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

14.00000000 0.10000000 NUM

4b3d_e6c1

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is linked with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene N is correlated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene Y is correlated with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
artsy, nerdy, yucky	a	n	y	181
artsy, nerdy	a	n	+	2,801
artsy, yucky	a	+	y	764
artsy	a	+	+	960
nerdy, yucky	+	n	y	993
nerdy	+	n	+	724
yucky	+	+	y	2,686
wildtype	+	+	+	191
TOTAL =				9,300

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and N during meiosis.

calculate the genetic distance between the two genes A and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

37.00000000 0.10000000 NUM

e086_98d7

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is associated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene F is correlated with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene W is linked with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
chummy, fuzzy, waxy	c	f	w	3,591
chummy, fuzzy	c	f	+	867
chummy, waxy	c	+	w	45
chummy	c	+	+	467
fuzzy, waxy	+	f	w	415
fuzzy	+	f	+	53
waxy	+	+	w	799
wildtype	+	+	+	3,563
TOTAL =				9,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes F and W during meiosis.

calculate the genetic distance between the two genes F and W, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

18.00000000 0.10000000 NUM

6381_116e

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene J is related to the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene N is correlated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene Y is related to the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
jerky, nerdy, yucky	j	n	y	20
jerky, nerdy	j	n	+	370
jerky, yucky	j	+	y	51
jerky	j	+	+	203
nerdy, yucky	+	n	y	175
nerdy	+	n	+	39
yucky	+	+	y	320
wildtype	+	+	+	22
TOTAL =				1,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes J and Y during meiosis.

calculate the genetic distance between the two genes J and Y, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

11.00000000 0.10000000 NUM

5271_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is related to the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene K is connected with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene N is affiliated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.

Phenotype	Genotypes			Progeny Count
dewy, kidney, nerdy	d	k	n	465
dewy, kidney	d	k	+	764
dewy, nerdy	d	+	n	1,685
dewy	d	+	+	170
kidney, nerdy	+	k	n	171
kidney	+	k	+	1,756
nerdy	+	+	n	755
wildtype	+	+	+	434
TOTAL =				6,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and N during meiosis.

calculate the genetic distance between the two genes D and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

beb1_a9f1

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is analogous to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene E is analogous to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene N is analogous to the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.

Phenotype	Genotypes			Progeny Count
chummy, eery, nerdy	c	e	n	119
chummy, eery	c	e	+	29
chummy, nerdy	c	+	n	1,000
chummy	c	+	+	423
eery, nerdy	+	e	n	383
eery	+	e	+	984
nerdy	+	+	n	33
wildtype	+	+	+	129
TOTAL =				3,100

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and N during meiosis.

calculate the genetic distance between the two genes C and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

28.00000000 0.10000000 NUM

5e71_bf92

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is affiliated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene N is correlated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene P is related to the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
chummy, nerdy, prickly	c	n	p	293
chummy, nerdy	c	n	+	2,447
chummy, prickly	c	+	p	17
chummy	c	+	+	473
nerdy, prickly	+	n	p	455
nerdy	+	n	+	15
prickly	+	+	p	2,385
wildtype	+	+	+	315
TOTAL =				6,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and P during meiosis.

calculate the genetic distance between the two genes C and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

10.00000000 0.10000000 NUM

70a0_a9f1

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is associated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene N is affiliated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene P is linked with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
chummy, nerdy, prickly	c	n	p	4
chummy, nerdy	c	n	+	245
chummy, prickly	c	+	p	41
chummy	c	+	+	704
nerdy, prickly	+	n	p	726
nerdy	+	n	+	49
prickly	+	+	p	225
wildtype	+	+	+	6
TOTAL =				2,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes N and P during meiosis.

calculate the genetic distance between the two genes N and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

28.00000000 0.10000000 NUM

d73b_116e

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene H is related to the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene T is correlated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.
Gene X is related to the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
horsey, tipsy, xanthic	h	t	x	74
horsey, tipsy	h	t	+	1,211
horsey, xanthic	h	+	x	145
horsey	h	+	+	668
tipsy, xanthic	+	t	x	655
tipsy	+	t	+	170
xanthic	+	+	x	1,204
wildtype	+	+	+	73
TOTAL =				4,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes H and X during meiosis.

calculate the genetic distance between the two genes H and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

11.00000000 0.10000000 NUM

56b4_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is analogous to the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene J is connected with the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene Y is affiliated with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
artsy, jerky, yucky	a	j	y	31
artsy, jerky	a	j	+	127
artsy, yucky	a	+	y	401
artsy	a	+	+	6
jerky, yucky	+	j	y	12
jerky	+	j	+	433
yucky	+	+	y	155
wildtype	+	+	+	35
TOTAL =				1,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and Y during meiosis.

calculate the genetic distance between the two genes A and Y, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

a010_d38f

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is affiliated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene N is correlated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene W is associated with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
chummy, nerdy, waxy	c	n	w	112
chummy, nerdy	c	n	+	999
chummy, waxy	c	+	w	348
chummy	c	+	+	8
nerdy, waxy	+	n	w	7
nerdy	+	n	+	387
waxy	+	+	w	1,026
wildtype	+	+	+	113
TOTAL =				3,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and W during meiosis.

calculate the genetic distance between the two genes C and W, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

32.00000000 0.10000000 NUM

b839_483d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene E is connected with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene P is correlated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene R is related to the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
eery, prickly, rusty	e	p	r	125
eery, prickly	e	p	+	33
eery, rusty	e	+	r	2,095
eery	e	+	+	1,212
prickly, rusty	+	p	r	1,238
prickly	+	p	+	2,105
rusty	+	+	r	37
wildtype	+	+	+	155
TOTAL =				7,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes E and R during meiosis.

calculate the genetic distance between the two genes E and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

36.00000000 0.10000000 NUM

ccd3_c36d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is linked with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene D is analogous to the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene J is linked with the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.

Phenotype	Genotypes			Progeny Count
artsy, dewy, jerky	a	d	j	3,256
artsy, dewy	a	d	+	46
artsy, jerky	a	+	j	173
artsy	a	+	+	901
dewy, jerky	+	d	j	905
dewy	+	d	+	171
jerky	+	+	j	40
wildtype	+	+	+	3,108
TOTAL =				8,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and J during meiosis.

calculate the genetic distance between the two genes A and J, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

22.00000000 0.10000000 NUM

c297_8adc

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is analogous to the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene E is related to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene H is connected with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.

Phenotype	Genotypes			Progeny Count
artsy, eery, horsey	a	e	h	1,739
artsy, eery	a	e	+	554
artsy, horsey	a	+	h	82
artsy	a	+	+	336
eery, horsey	+	e	h	300
eery	+	e	+	77
horsey	+	+	h	559
wildtype	+	+	+	1,653
TOTAL =				5,300

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and E during meiosis.

calculate the genetic distance between the two genes A and E, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

15.00000000 0.10000000 NUM

db88_4725

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is correlated with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene K is affiliated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene N is linked with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.

Phenotype	Genotypes			Progeny Count
bumpy, kidney, nerdy	b	k	n	2,660
bumpy, kidney	b	k	+	1,022
bumpy, nerdy	b	+	n	267
bumpy	b	+	+	39
kidney, nerdy	+	k	n	39
kidney	+	k	+	279
nerdy	+	+	n	850
wildtype	+	+	+	2,644
TOTAL =				7,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes K and B during meiosis.

calculate the genetic distance between the two genes K and B, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

8.00000000 0.10000000 NUM

70a6_b913

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is related to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene H is associated with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene R is affiliated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
chummy, horsey, rusty	c	h	r	2,274
chummy, horsey	c	h	+	172
chummy, rusty	c	+	r	803
chummy	c	+	+	693
horsey, rusty	+	h	r	707
horsey	+	h	+	837
rusty	+	+	r	188
wildtype	+	+	+	2,326
TOTAL =				8,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and H during meiosis.

calculate the genetic distance between the two genes C and H, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

38.00000000 0.10000000 NUM

f4d6_8adc

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is analogous to the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene N is affiliated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene R is analogous to the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
dewy, nerdy, rusty	d	n	r	161
dewy, nerdy	d	n	+	341
dewy, rusty	d	+	r	1,886
dewy	d	+	+	969
nerdy, rusty	+	n	r	912
nerdy	+	n	+	1,843
rusty	+	+	r	352
wildtype	+	+	+	136
TOTAL =				6,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and N during meiosis.

calculate the genetic distance between the two genes D and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

15.00000000 0.10000000 NUM

c594_c36d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is correlated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene P is associated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene R is affiliated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
dewy, prickly, rusty	d	p	r	2,266
dewy, prickly	d	p	+	43
dewy, rusty	d	+	r	276
dewy	d	+	+	645
prickly, rusty	+	p	r	699
prickly	+	p	+	300
rusty	+	+	r	21
wildtype	+	+	+	2,150
TOTAL =				6,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and R during meiosis.

calculate the genetic distance between the two genes D and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

22.00000000 0.10000000 NUM

00c8_c36d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is related to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene E is connected with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene K is connected with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.

Phenotype	Genotypes			Progeny Count
chummy, eery, kidney	c	e	k	766
chummy, eery	c	e	+	177
chummy, kidney	c	+	k	614
chummy	c	+	+	2,133
eery, kidney	+	e	k	2,122
eery	+	e	+	681
kidney	+	+	k	156
wildtype	+	+	+	751
TOTAL =				7,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes E and K during meiosis.

calculate the genetic distance between the two genes E and K, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

22.00000000 0.10000000 NUM

4759_98d7

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is correlated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene E is analogous to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene F is correlated with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.

Phenotype	Genotypes			Progeny Count
chummy, eery, fuzzy	c	e	f	17
chummy, eery	c	e	+	2,972
chummy, fuzzy	c	+	f	689
chummy	c	+	+	154
eery, fuzzy	+	e	f	197
eery	+	e	+	676
fuzzy	+	+	f	3,073
wildtype	+	+	+	22
TOTAL =				7,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and F during meiosis.

calculate the genetic distance between the two genes C and F, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

18.00000000 0.10000000 NUM

3c11_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is connected with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene C is connected with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene D is linked with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.

Phenotype	Genotypes			Progeny Count
artsy, chummy, dewy	a	c	d	2,859
artsy, chummy	a	c	+	663
artsy, dewy	a	+	d	1,026
artsy	a	+	+	177
chummy, dewy	+	c	d	152
chummy	+	c	+	995
dewy	+	+	d	700
wildtype	+	+	+	2,828
TOTAL =				9,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and A during meiosis.

calculate the genetic distance between the two genes C and A, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

16f4_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is related to the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene B is analogous to the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene W is connected with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
artsy, bumpy, waxy	a	b	w	2,734
artsy, bumpy	a	b	+	111
artsy, waxy	a	+	w	1,018
artsy	a	+	+	711
bumpy, waxy	+	b	w	715
bumpy	+	b	+	1,052
waxy	+	+	w	119
wildtype	+	+	+	2,740
TOTAL =				9,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes W and B during meiosis.

calculate the genetic distance between the two genes W and B, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

056b_b913

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is correlated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene F is linked with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene W is linked with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
artsy, fuzzy, waxy	a	f	w	15
artsy, fuzzy	a	f	+	132
artsy, waxy	a	+	w	183
artsy	a	+	+	471
fuzzy, waxy	+	f	w	481
fuzzy	+	f	+	177
waxy	+	+	w	116
wildtype	+	+	+	25
TOTAL =				1,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes F and W during meiosis.

calculate the genetic distance between the two genes F and W, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

38.00000000 0.10000000 NUM

f368_05e4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene N is related to the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene R is associated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.
Gene W is related to the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
nerdy, rusty, waxy	n	r	w	2,725
nerdy, rusty	n	r	+	63
nerdy, waxy	n	+	w	337
nerdy	n	+	+	1,088
rusty, waxy	+	r	w	1,105
rusty	+	r	+	394
waxy	+	+	w	66
wildtype	+	+	+	2,822
TOTAL =				8,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes N and R during meiosis.

calculate the genetic distance between the two genes N and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

34.00000000 0.10000000 NUM

66c2_b913

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is correlated with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene D is linked with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene T is associated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
bumpy, dewy, tipsy	b	d	t	456
bumpy, dewy	b	d	+	100
bumpy, tipsy	b	+	t	371
bumpy	b	+	+	1,268
dewy, tipsy	+	d	t	1,262
dewy	+	d	+	399
tipsy	+	+	t	98
wildtype	+	+	+	446
TOTAL =				4,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes B and T during meiosis.

calculate the genetic distance between the two genes B and T, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

38.00000000 0.10000000 NUM

8974_30aa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene E is correlated with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene H is associated with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene W is connected with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
eery, horsey, waxy	e	h	w	403
eery, horsey	e	h	+	56
eery, waxy	e	+	w	2,155
eery	e	+	+	579
horsey, waxy	+	h	w	555
horsey	+	h	+	2,066
waxy	+	+	w	70
wildtype	+	+	+	416
TOTAL =				6,300

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes H and W during meiosis.

calculate the genetic distance between the two genes H and W, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

31.00000000 0.10000000 NUM

b3ed_7d73

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is affiliated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene M is associated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene R is affiliated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
dewy, mushy, rusty	d	m	r	216
dewy, mushy	d	m	+	99
dewy, rusty	d	+	r	12
dewy	d	+	+	602
mushy, rusty	+	m	r	577
mushy	+	m	+	15
rusty	+	+	r	72
wildtype	+	+	+	207
TOTAL =				1,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and M during meiosis.

calculate the genetic distance between the two genes D and M, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

33.00000000 0.10000000 NUM

4539_483d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene R is related to the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.
Gene T is associated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.
Gene X is analogous to the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
rusty, tipsy, xanthic	r	t	x	175
rusty, tipsy	r	t	+	615
rusty, xanthic	r	+	x	790
rusty	r	+	+	2,353
tipsy, xanthic	+	t	x	2,407
tipsy	+	t	+	850
xanthic	+	+	x	625
wildtype	+	+	+	185
TOTAL =				8,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes T and X during meiosis.

calculate the genetic distance between the two genes T and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

36.00000000 0.10000000 NUM

16ca_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is correlated with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene X is correlated with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.
Gene Y is related to the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
bumpy, xanthic, yucky	b	x	y	597
bumpy, xanthic	b	x	+	293
bumpy, yucky	b	+	y	36
bumpy	b	+	+	1,689
xanthic, yucky	+	x	y	1,665
xanthic	+	x	+	42
yucky	+	+	y	253
wildtype	+	+	+	625
TOTAL =				5,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes B and Y during meiosis.

calculate the genetic distance between the two genes B and Y, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

99d3_e6c1

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene K is analogous to the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene N is related to the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene W is related to the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
kidney, nerdy, waxy	k	n	w	37
kidney, nerdy	k	n	+	105
kidney, waxy	k	+	w	600
kidney	k	+	+	279
nerdy, waxy	+	n	w	251
nerdy	+	n	+	590
waxy	+	+	w	105
wildtype	+	+	+	33
TOTAL =				2,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes K and W during meiosis.

calculate the genetic distance between the two genes K and W, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

37.00000000 0.10000000 NUM

e5bc_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is related to the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene C is analogous to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene K is correlated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.

Phenotype	Genotypes			Progeny Count
bumpy, chummy, kidney	b	c	k	19
bumpy, chummy	b	c	+	232
bumpy, kidney	b	+	k	1,002
bumpy	b	+	+	2,843
chummy, kidney	+	c	k	2,856
chummy	+	c	+	1,007
kidney	+	+	k	219
wildtype	+	+	+	22
TOTAL =				8,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes B and K during meiosis.

calculate the genetic distance between the two genes B and K, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

c539_17ef

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene P is related to the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene W is associated with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.
Gene Y is associated with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
prickly, waxy, yucky	p	w	y	558
prickly, waxy	p	w	+	56
prickly, yucky	p	+	y	1,467
prickly	p	+	+	385
waxy, yucky	+	w	y	383
waxy	+	w	+	1,365
yucky	+	+	y	40
wildtype	+	+	+	546
TOTAL =				4,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes W and Y during meiosis.

calculate the genetic distance between the two genes W and Y, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

39.00000000 0.10000000 NUM

be24_f24b

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene F is connected with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene H is analogous to the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene R is analogous to the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
fuzzy, horsey, rusty	f	h	r	1,096
fuzzy, horsey	f	h	+	184
fuzzy, rusty	f	+	r	409
fuzzy	f	+	+	11
horsey, rusty	+	h	r	6
horsey	+	h	+	424
rusty	+	+	r	207
wildtype	+	+	+	1,063
TOTAL =				3,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes F and R during meiosis.

calculate the genetic distance between the two genes F and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

12.00000000 0.10000000 NUM

e54d_935f

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene E is related to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene P is affiliated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene Y is connected with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
eery, prickly, yucky	e	p	y	17
eery, prickly	e	p	+	726
eery, yucky	e	+	y	434
eery	e	+	+	37
prickly, yucky	+	p	y	47
prickly	+	p	+	394
yucky	+	+	y	726
wildtype	+	+	+	19
TOTAL =				2,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes Y and P during meiosis.

calculate the genetic distance between the two genes Y and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

5.00000000 0.10000000 NUM

a531_a9f1

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is correlated with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene K is linked with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene W is analogous to the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
bumpy, kidney, waxy	b	k	w	70
bumpy, kidney	b	k	+	986
bumpy, waxy	b	+	w	2,475
bumpy	b	+	+	275
kidney, waxy	+	k	w	345
kidney	+	k	+	2,485
waxy	+	+	w	1,029
wildtype	+	+	+	85
TOTAL =				7,750

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes B and K during meiosis.

calculate the genetic distance between the two genes B and K, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

28.00000000 0.10000000 NUM

6af2_4725

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is correlated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene D is correlated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene P is linked with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
artsy, dewy, prickly	a	d	p	585
artsy, dewy	a	d	+	1,273
artsy, prickly	a	+	p	45
artsy	a	+	+	123
dewy, prickly	+	d	p	123
dewy	+	d	+	37
prickly	+	+	p	1,351
wildtype	+	+	+	563
TOTAL =				4,100

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and A during meiosis.

calculate the genetic distance between the two genes D and A, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

8.00000000 0.10000000 NUM

2ce8_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is linked with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene N is associated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene P is connected with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
chummy, nerdy, prickly	c	n	p	122
chummy, nerdy	c	n	+	2,484
chummy, prickly	c	+	p	882
chummy	c	+	+	502
nerdy, prickly	+	n	p	498
nerdy	+	n	+	838
prickly	+	+	p	2,516
wildtype	+	+	+	158
TOTAL =				8,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and P during meiosis.

calculate the genetic distance between the two genes C and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

86a6_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene R is affiliated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.
Gene T is affiliated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.
Gene W is associated with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
rusty, tipsy, waxy	r	t	w	841
rusty, tipsy	r	t	+	29
rusty, waxy	r	+	w	208
rusty	r	+	+	230
tipsy, waxy	+	t	w	238
tipsy	+	t	+	208
waxy	+	+	w	23
wildtype	+	+	+	823
TOTAL =				2,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes R and W during meiosis.

calculate the genetic distance between the two genes R and W, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

00f6_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is analogous to the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene E is affiliated with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene F is related to the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.

Phenotype	Genotypes			Progeny Count
artsy, eery, fuzzy	a	e	f	618
artsy, eery	a	e	+	37
artsy, fuzzy	a	+	f	173
artsy	a	+	+	2,543
eery, fuzzy	+	e	f	2,482
eery	+	e	+	162
fuzzy	+	+	f	30
wildtype	+	+	+	655
TOTAL =				6,700

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and E during meiosis.

calculate the genetic distance between the two genes A and E, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

32ad_4725

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is associated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene E is linked with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene R is connected with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
dewy, eery, rusty	d	e	r	2,410
dewy, eery	d	e	+	236
dewy, rusty	d	+	r	1,041
dewy	d	+	+	65
eery, rusty	+	e	r	46
eery	+	e	+	1,068
rusty	+	+	r	245
wildtype	+	+	+	2,289
TOTAL =				7,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and R during meiosis.

calculate the genetic distance between the two genes D and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

8.00000000 0.10000000 NUM

9725_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene H is linked with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene K is analogous to the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene P is correlated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
horsey, kidney, prickly	h	k	p	165
horsey, kidney	h	k	+	2,370
horsey, prickly	h	+	p	845
horsey	h	+	+	657
kidney, prickly	+	k	p	639
kidney	+	k	+	856
prickly	+	+	p	2,409
wildtype	+	+	+	159
TOTAL =				8,100

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes P and K during meiosis.

calculate the genetic distance between the two genes P and K, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

05fe_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is affiliated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene T is analogous to the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.
Gene Y is linked with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
chummy, tipsy, yucky	c	t	y	240
chummy, tipsy	c	t	+	882
chummy, yucky	c	+	y	393
chummy	c	+	+	79
tipsy, yucky	+	t	y	97
tipsy	+	t	+	391
yucky	+	+	y	894
wildtype	+	+	+	224
TOTAL =				3,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes T and Y during meiosis.

calculate the genetic distance between the two genes T and Y, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

13f7_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is linked with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene K is affiliated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene W is analogous to the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
artsy, kidney, waxy	a	k	w	265
artsy, kidney	a	k	+	677
artsy, waxy	a	+	w	2,512
artsy	a	+	+	1,103
kidney, waxy	+	k	w	1,151
kidney	+	k	+	2,594
waxy	+	+	w	657
wildtype	+	+	+	241
TOTAL =				9,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and K during meiosis.

calculate the genetic distance between the two genes A and K, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

ce6f_ab18

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene H is analogous to the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene K is connected with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene P is correlated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
horsey, kidney, prickly	h	k	p	1,194
horsey, kidney	h	k	+	364
horsey, prickly	h	+	p	131
horsey	h	+	+	2,776
kidney, prickly	+	k	p	2,804
kidney	+	k	+	139
prickly	+	+	p	356
wildtype	+	+	+	1,236
TOTAL =				9,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes H and K during meiosis.

calculate the genetic distance between the two genes H and K, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

35.00000000 0.10000000 NUM

a269_a9f1

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is affiliated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene K is affiliated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene M is connected with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

Phenotype	Genotypes			Progeny Count
dewy, kidney, mushy	d	k	m	52
dewy, kidney	d	k	+	162
dewy, mushy	d	+	m	959
dewy	d	+	+	395
kidney, mushy	+	k	m	389
kidney	+	k	+	977
mushy	+	+	m	206
wildtype	+	+	+	60
TOTAL =				3,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes K and M during meiosis.

calculate the genetic distance between the two genes K and M, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

28.00000000 0.10000000 NUM

2e11_8adc

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene P is affiliated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene R is analogous to the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.
Gene T is related to the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
prickly, rusty, tipsy	p	r	t	7
prickly, rusty	p	r	+	159
prickly, tipsy	p	+	t	72
prickly	p	+	+	1,324
rusty, tipsy	+	r	t	1,211
rusty	+	r	+	63
tipsy	+	+	t	156
wildtype	+	+	+	8
TOTAL =				3,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes R and T during meiosis.

calculate the genetic distance between the two genes R and T, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

15.00000000 0.10000000 NUM

f848_98d7

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is affiliated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene N is connected with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene T is correlated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
artsy, nerdy, tipsy	a	n	t	463
artsy, nerdy	a	n	+	155
artsy, tipsy	a	+	t	2,878
artsy	a	+	+	23
nerdy, tipsy	+	n	t	12
nerdy	+	n	+	2,827
tipsy	+	+	t	160
wildtype	+	+	+	482
TOTAL =				7,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and N during meiosis.

calculate the genetic distance between the two genes A and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

18.00000000 0.10000000 NUM

87ec_483d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is affiliated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene E is linked with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene J is linked with the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.

Phenotype	Genotypes			Progeny Count
dewy, eery, jerky	d	e	j	45
dewy, eery	d	e	+	9
dewy, jerky	d	+	j	179
dewy	d	+	+	376
eery, jerky	+	e	j	374
eery	+	e	+	163
jerky	+	+	j	9
wildtype	+	+	+	45
TOTAL =				1,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and J during meiosis.

calculate the genetic distance between the two genes D and J, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

36.00000000 0.10000000 NUM

2496_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is correlated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene H is analogous to the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene K is related to the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.

Phenotype	Genotypes			Progeny Count
artsy, horsey, kidney	a	h	k	141
artsy, horsey	a	h	+	9
artsy, kidney	a	+	k	913
artsy	a	+	+	439
horsey, kidney	+	h	k	446
horsey	+	h	+	902
kidney	+	+	k	6
wildtype	+	+	+	144
TOTAL =				3,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and K during meiosis.

calculate the genetic distance between the two genes A and K, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

e65b_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is linked with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene D is affiliated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene J is correlated with the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.

Phenotype	Genotypes			Progeny Count
artsy, dewy, jerky	a	d	j	2,934
artsy, dewy	a	d	+	666
artsy, jerky	a	+	j	133
artsy	a	+	+	761
dewy, jerky	+	d	j	752
dewy	+	d	+	134
jerky	+	+	j	669
wildtype	+	+	+	2,851
TOTAL =				8,900

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and D during meiosis.

calculate the genetic distance between the two genes A and D, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

ba89_bf92

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is linked with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene B is linked with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene D is related to the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.

Phenotype	Genotypes			Progeny Count
artsy, bumpy, dewy	a	b	d	1,389
artsy, bumpy	a	b	+	2,986
artsy, dewy	a	+	d	88
artsy	a	+	+	392
bumpy, dewy	+	b	d	384
bumpy	+	b	+	106
dewy	+	+	d	3,028
wildtype	+	+	+	1,327
TOTAL =				9,700

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes B and A during meiosis.

calculate the genetic distance between the two genes B and A, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

10.00000000 0.10000000 NUM

d09a_c36d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene R is connected with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.
Gene T is correlated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.
Gene Y is correlated with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
rusty, tipsy, yucky	r	t	y	202
rusty, tipsy	r	t	+	312
rusty, yucky	r	+	y	1,111
rusty	r	+	+	54
tipsy, yucky	+	t	y	45
tipsy	+	t	+	1,067
yucky	+	+	y	315
wildtype	+	+	+	194
TOTAL =				3,300

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes R and Y during meiosis.

calculate the genetic distance between the two genes R and Y, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

22.00000000 0.10000000 NUM

4887_7d73

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene M is related to the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene N is analogous to the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene R is correlated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
mushy, nerdy, rusty	m	n	r	687
mushy, nerdy	m	n	+	1,645
mushy, rusty	m	+	r	23
mushy	m	+	+	95
nerdy, rusty	+	n	r	101
nerdy	+	n	+	26
rusty	+	+	r	1,589
wildtype	+	+	+	734
TOTAL =				4,900

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes N and R during meiosis.

calculate the genetic distance between the two genes N and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

33.00000000 0.10000000 NUM

0b18_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene F is linked with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene M is related to the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene P is linked with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
fuzzy, mushy, prickly	f	m	p	2,327
fuzzy, mushy	f	m	+	13
fuzzy, prickly	f	+	p	540
fuzzy	f	+	+	702
mushy, prickly	+	m	p	702
mushy	+	m	+	504
prickly	+	+	p	23
wildtype	+	+	+	2,389
TOTAL =				7,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes F and P during meiosis.

calculate the genetic distance between the two genes F and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

5737_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is connected with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene K is related to the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene M is related to the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

Phenotype	Genotypes			Progeny Count
chummy, kidney, mushy	c	k	m	46
chummy, kidney	c	k	+	225
chummy, mushy	c	+	m	3,300
chummy	c	+	+	838
kidney, mushy	+	k	m	853
kidney	+	k	+	3,375
mushy	+	+	m	220
wildtype	+	+	+	43
TOTAL =				8,900

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes K and M during meiosis.

calculate the genetic distance between the two genes K and M, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

3d6a_a9f1

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is associated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene K is connected with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene T is analogous to the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
artsy, kidney, tipsy	a	k	t	261
artsy, kidney	a	k	+	89
artsy, tipsy	a	+	t	27
artsy	a	+	+	953
kidney, tipsy	+	k	t	937
kidney	+	k	+	27
tipsy	+	+	t	127
wildtype	+	+	+	279
TOTAL =				2,700

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and K during meiosis.

calculate the genetic distance between the two genes A and K, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

28.00000000 0.10000000 NUM

778c_a9f1

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is analogous to the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene D is linked with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene X is analogous to the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
artsy, dewy, xanthic	a	d	x	52
artsy, dewy	a	d	+	755
artsy, xanthic	a	+	x	7
artsy	a	+	+	313
dewy, xanthic	+	d	x	281
dewy	+	d	+	15
xanthic	+	+	x	741
wildtype	+	+	+	36
TOTAL =				2,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and A during meiosis.

calculate the genetic distance between the two genes D and A, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

28.00000000 0.10000000 NUM

c0a2_17ef

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is affiliated with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene E is correlated with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene Y is connected with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
bumpy, eery, yucky	b	e	y	629
bumpy, eery	b	e	+	1,577
bumpy, yucky	b	+	y	435
bumpy	b	+	+	60
eery, yucky	+	e	y	46
eery	+	e	+	413
yucky	+	+	y	1,550
wildtype	+	+	+	590
TOTAL =				5,300

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes B and Y during meiosis.

calculate the genetic distance between the two genes B and Y, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

39.00000000 0.10000000 NUM

575d_c36d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is affiliated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene K is analogous to the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene P is connected with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
chummy, kidney, prickly	c	k	p	163
chummy, kidney	c	k	+	384
chummy, prickly	c	+	p	1,257
chummy	c	+	+	18
kidney, prickly	+	k	p	19
kidney	+	k	+	1,296
prickly	+	+	p	393
wildtype	+	+	+	170
TOTAL =				3,700

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and P during meiosis.

calculate the genetic distance between the two genes C and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

22.00000000 0.10000000 NUM

25fa_57c7

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene M is associated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene P is connected with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene X is affiliated with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
mushy, prickly, xanthic	m	p	x	63
mushy, prickly	m	p	+	658
mushy, xanthic	m	+	x	255
mushy	m	+	+	2,618
prickly, xanthic	+	p	x	2,602
prickly	+	p	+	285
xanthic	+	+	x	674
wildtype	+	+	+	45
TOTAL =				7,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes M and X during meiosis.

calculate the genetic distance between the two genes M and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

9.00000000 0.10000000 NUM

a971_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene F is correlated with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene W is linked with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.
Gene X is associated with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
fuzzy, waxy, xanthic	f	w	x	198
fuzzy, waxy	f	w	+	35
fuzzy, xanthic	f	+	x	581
fuzzy	f	+	+	1,238
waxy, xanthic	+	w	x	1,303
waxy	+	w	+	616
xanthic	+	+	x	28
wildtype	+	+	+	201
TOTAL =				4,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes W and X during meiosis.

calculate the genetic distance between the two genes W and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

7c39_070d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene M is connected with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene P is affiliated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene X is affiliated with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
mushy, prickly, xanthic	m	p	x	188
mushy, prickly	m	p	+	620
mushy, xanthic	m	+	x	100
mushy	m	+	+	9
prickly, xanthic	+	p	x	10
prickly	+	p	+	90
xanthic	+	+	x	710
wildtype	+	+	+	173
TOTAL =				1,900

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes M and X during meiosis.

calculate the genetic distance between the two genes M and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

29.00000000 0.10000000 NUM

40e1_b913

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is analogous to the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene E is affiliated with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene R is affiliated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
dewy, eery, rusty	d	e	r	410
dewy, eery	d	e	+	371
dewy, rusty	d	+	r	104
dewy	d	+	+	1,142
eery, rusty	+	e	r	1,158
eery	+	e	+	76
rusty	+	+	r	329
wildtype	+	+	+	410
TOTAL =				4,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and E during meiosis.

calculate the genetic distance between the two genes D and E, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

38.00000000 0.10000000 NUM

b316_2420

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is linked with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene C is analogous to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene D is affiliated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.

Phenotype	Genotypes			Progeny Count
bumpy, chummy, dewy	b	c	d	733
bumpy, chummy	b	c	+	92
bumpy, dewy	b	+	d	378
bumpy	b	+	+	2,035
chummy, dewy	+	c	d	2,029
chummy	+	c	+	358
dewy	+	+	d	68
wildtype	+	+	+	707
TOTAL =				6,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and D during meiosis.

calculate the genetic distance between the two genes C and D, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

14.00000000 0.10000000 NUM

0398_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is connected with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene F is associated with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene R is related to the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
artsy, fuzzy, rusty	a	f	r	1,502
artsy, fuzzy	a	f	+	171
artsy, rusty	a	+	r	15
artsy	a	+	+	202
fuzzy, rusty	+	f	r	216
fuzzy	+	f	+	23
rusty	+	+	r	171
wildtype	+	+	+	1,500
TOTAL =				3,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and R during meiosis.

calculate the genetic distance between the two genes A and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

606b_b29b

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene F is correlated with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene M is analogous to the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene X is linked with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
fuzzy, mushy, xanthic	f	m	x	78
fuzzy, mushy	f	m	+	957
fuzzy, xanthic	f	+	x	18
fuzzy	f	+	+	327
mushy, xanthic	+	m	x	345
mushy	+	m	+	10
xanthic	+	+	x	975
wildtype	+	+	+	90
TOTAL =				2,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes F and X during meiosis.

calculate the genetic distance between the two genes F and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

7.00000000 0.10000000 NUM

1b22_8adc

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene E is affiliated with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene R is analogous to the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.
Gene T is affiliated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
eery, rusty, tipsy	e	r	t	1,420
eery, rusty	e	r	+	508
eery, tipsy	e	+	t	38
eery	e	+	+	322
rusty, tipsy	+	r	t	299
rusty	+	r	+	31
tipsy	+	+	t	573
wildtype	+	+	+	1,409
TOTAL =				4,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes E and R during meiosis.

calculate the genetic distance between the two genes E and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

15.00000000 0.10000000 NUM

6e6d_ab18

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene J is affiliated with the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene M is connected with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene T is analogous to the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
jerky, mushy, tipsy	j	m	t	1,392
jerky, mushy	j	m	+	762
jerky, tipsy	j	+	t	68
jerky	j	+	+	169
mushy, tipsy	+	m	t	174
mushy	+	m	+	79
tipsy	+	+	t	806
wildtype	+	+	+	1,450
TOTAL =				4,900

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes M and T during meiosis.

calculate the genetic distance between the two genes M and T, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

35.00000000 0.10000000 NUM

fe6e_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is correlated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene M is linked with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene P is connected with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
artsy, mushy, prickly	a	m	p	15
artsy, mushy	a	m	+	776
artsy, prickly	a	+	p	223
artsy	a	+	+	185
mushy, prickly	+	m	p	211
mushy	+	m	+	221
prickly	+	+	p	748
wildtype	+	+	+	21
TOTAL =				2,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and P during meiosis.

calculate the genetic distance between the two genes A and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

ae0f_ab18

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is associated with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene J is analogous to the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene Y is associated with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
bumpy, jerky, yucky	b	j	y	20
bumpy, jerky	b	j	+	1,595
bumpy, yucky	b	+	y	626
bumpy	b	+	+	306
jerky, yucky	+	j	y	255
jerky	+	j	+	598
yucky	+	+	y	1,669
wildtype	+	+	+	31
TOTAL =				5,100

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes B and J during meiosis.

calculate the genetic distance between the two genes B and J, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

35.00000000 0.10000000 NUM

1985_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is related to the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene D is linked with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene H is associated with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.

Phenotype	Genotypes			Progeny Count
artsy, dewy, horsey	a	d	h	41
artsy, dewy	a	d	+	650
artsy, horsey	a	+	h	246
artsy	a	+	+	1,909
dewy, horsey	+	d	h	1,815
dewy	+	d	+	230
horsey	+	+	h	666
wildtype	+	+	+	43
TOTAL =				5,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and A during meiosis.

calculate the genetic distance between the two genes D and A, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

9ad1_05e4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is connected with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene E is associated with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene X is analogous to the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
bumpy, eery, xanthic	b	e	x	162
bumpy, eery	b	e	+	36
bumpy, xanthic	b	+	x	1,628
bumpy	b	+	+	691
eery, xanthic	+	e	x	734
eery	+	e	+	1,597
xanthic	+	+	x	39
wildtype	+	+	+	113
TOTAL =				5,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes E and X during meiosis.

calculate the genetic distance between the two genes E and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

34.00000000 0.10000000 NUM

dbb8_bf92

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene F is linked with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene P is correlated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene W is associated with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
fuzzy, prickly, waxy	f	p	w	345
fuzzy, prickly	f	p	+	156
fuzzy, waxy	f	+	w	2,911
fuzzy	f	+	+	1,581
prickly, waxy	+	p	w	1,555
prickly	+	p	+	2,773
waxy	+	+	w	138
wildtype	+	+	+	341
TOTAL =				9,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes P and F during meiosis.

calculate the genetic distance between the two genes P and F, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

10.00000000 0.10000000 NUM

45cb_57c7

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is related to the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene R is connected with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.
Gene T is analogous to the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
bumpy, rusty, tipsy	b	r	t	1,757
bumpy, rusty	b	r	+	20
bumpy, tipsy	b	+	t	199
bumpy	b	+	+	470
rusty, tipsy	+	r	t	442
rusty	+	r	+	185
tipsy	+	+	t	28
wildtype	+	+	+	1,699
TOTAL =				4,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes T and R during meiosis.

calculate the genetic distance between the two genes T and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

9.00000000 0.10000000 NUM

8d34_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene M is associated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene W is associated with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.
Gene Y is connected with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
mushy, waxy, yucky	m	w	y	258
mushy, waxy	m	w	+	1,048
mushy, yucky	m	+	y	48
mushy	m	+	+	3,113
waxy, yucky	+	w	y	3,097
waxy	+	w	+	42
yucky	+	+	y	1,112
wildtype	+	+	+	282
TOTAL =				9,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes M and W during meiosis.

calculate the genetic distance between the two genes M and W, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

edb2_f623

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is connected with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene B is associated with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene J is related to the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.

Phenotype	Genotypes			Progeny Count
artsy, bumpy, jerky	a	b	j	30
artsy, bumpy	a	b	+	186
artsy, jerky	a	+	j	950
artsy	a	+	+	3,132
bumpy, jerky	+	b	j	3,132
bumpy	+	b	+	1,051
jerky	+	+	j	162
wildtype	+	+	+	57
TOTAL =				8,700

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes B and J during meiosis.

calculate the genetic distance between the two genes B and J, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

27.00000000 0.10000000 NUM

db58_bf92

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene E is connected with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene J is correlated with the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene R is linked with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
eery, jerky, rusty	e	j	r	1,265
eery, jerky	e	j	+	62
eery, rusty	e	+	r	762
eery	e	+	+	160
jerky, rusty	+	j	r	155
jerky	+	j	+	678
rusty	+	+	r	73
wildtype	+	+	+	1,345
TOTAL =				4,500

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes E and R during meiosis.

calculate the genetic distance between the two genes E and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

10.00000000 0.10000000 NUM

d81c_483d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is linked with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene F is linked with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene K is related to the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.

Phenotype	Genotypes			Progeny Count
chummy, fuzzy, kidney	c	f	k	1,765
chummy, fuzzy	c	f	+	194
chummy, kidney	c	+	k	761
chummy	c	+	+	25
fuzzy, kidney	+	f	k	30
fuzzy	+	f	+	834
kidney	+	+	k	191
wildtype	+	+	+	1,700
TOTAL =				5,500

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes F and K during meiosis.

calculate the genetic distance between the two genes F and K, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

36.00000000 0.10000000 NUM

366c_17ef

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is analogous to the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene F is linked with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene T is connected with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
dewy, fuzzy, tipsy	d	f	t	297
dewy, fuzzy	d	f	+	2,306
dewy, tipsy	d	+	t	1,252
dewy	d	+	+	126
fuzzy, tipsy	+	f	t	147
fuzzy	+	f	+	1,205
tipsy	+	+	t	2,179
wildtype	+	+	+	288
TOTAL =				7,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and T during meiosis.

calculate the genetic distance between the two genes D and T, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

39.00000000 0.10000000 NUM

5c71_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene M is affiliated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene N is connected with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene P is correlated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
mushy, nerdy, prickly	m	n	p	29
mushy, nerdy	m	n	+	1,859
mushy, prickly	m	+	p	255
mushy	m	+	+	693
nerdy, prickly	+	n	p	651
nerdy	+	n	+	249
prickly	+	+	p	1,837
wildtype	+	+	+	27
TOTAL =				5,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes P and N during meiosis.

calculate the genetic distance between the two genes P and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

4e3a_8adc

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene E is analogous to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene P is connected with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene T is analogous to the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
eery, prickly, tipsy	e	p	t	20
eery, prickly	e	p	+	445
eery, tipsy	e	+	t	216
eery	e	+	+	2,221
prickly, tipsy	+	p	t	2,274
prickly	+	p	+	219
tipsy	+	+	t	396
wildtype	+	+	+	9
TOTAL =				5,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes P and E during meiosis.

calculate the genetic distance between the two genes P and E, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

15.00000000 0.10000000 NUM

c716_1506

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is related to the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene M is correlated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene Y is related to the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
dewy, mushy, yucky	d	m	y	482
dewy, mushy	d	m	+	68
dewy, yucky	d	+	y	12
dewy	d	+	+	167
mushy, yucky	+	m	y	148
mushy	+	m	+	9
yucky	+	+	y	51
wildtype	+	+	+	463
TOTAL =				1,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and M during meiosis.

calculate the genetic distance between the two genes D and M, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

24.00000000 0.10000000 NUM

04a0_30aa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is associated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene N is associated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene X is related to the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
artsy, nerdy, xanthic	a	n	x	838
artsy, nerdy	a	n	+	219
artsy, xanthic	a	+	x	164
artsy	a	+	+	22
nerdy, xanthic	+	n	x	28
nerdy	+	n	+	161
xanthic	+	+	x	231
wildtype	+	+	+	837
TOTAL =				2,500

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes N and X during meiosis.

calculate the genetic distance between the two genes N and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

31.00000000 0.10000000 NUM

cf35_8adc

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is affiliated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene C is linked with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene Y is connected with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
artsy, chummy, yucky	a	c	y	3,283
artsy, chummy	a	c	+	462
artsy, yucky	a	+	y	613
artsy	a	+	+	48
chummy, yucky	+	c	y	39
chummy	+	c	+	605
yucky	+	+	y	495
wildtype	+	+	+	3,155
TOTAL =				8,700

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and A during meiosis.

calculate the genetic distance between the two genes C and A, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

15.00000000 0.10000000 NUM

5996_935f

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene H is associated with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene J is affiliated with the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene W is affiliated with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
horsey, jerky, waxy	h	j	w	899
horsey, jerky	h	j	+	131
horsey, waxy	h	+	w	31
horsey	h	+	+	1,850
jerky, waxy	+	j	w	1,862
jerky	+	j	+	27
waxy	+	+	w	101
wildtype	+	+	+	899
TOTAL =				5,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes W and J during meiosis.

calculate the genetic distance between the two genes W and J, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

5.00000000 0.10000000 NUM

2ac5_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is associated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene K is connected with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene R is connected with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
chummy, kidney, rusty	c	k	r	145
chummy, kidney	c	k	+	460
chummy, rusty	c	+	r	24
chummy	c	+	+	1,705
kidney, rusty	+	k	r	1,699
kidney	+	k	+	22
rusty	+	+	r	414
wildtype	+	+	+	131
TOTAL =				4,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and K during meiosis.

calculate the genetic distance between the two genes C and K, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

3c66_f24b

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is analogous to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene N is related to the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene T is associated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
chummy, nerdy, tipsy	c	n	t	946
chummy, nerdy	c	n	+	326
chummy, tipsy	c	+	t	33
chummy	c	+	+	135
nerdy, tipsy	+	n	t	150
nerdy	+	n	+	42
tipsy	+	+	t	349
wildtype	+	+	+	1,019
TOTAL =				3,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and N during meiosis.

calculate the genetic distance between the two genes C and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

12.00000000 0.10000000 NUM

7331_f24b

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is correlated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene T is correlated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.
Gene X is linked with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
chummy, tipsy, xanthic	c	t	x	1,081
chummy, tipsy	c	t	+	2,861
chummy, xanthic	c	+	x	520
chummy	c	+	+	19
tipsy, xanthic	+	t	x	26
tipsy	+	t	+	515
xanthic	+	+	x	2,854
wildtype	+	+	+	1,124
TOTAL =				9,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and T during meiosis.

calculate the genetic distance between the two genes C and T, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

12.00000000 0.10000000 NUM

5932_17ef

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene K is correlated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene M is associated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene P is related to the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
kidney, mushy, prickly	k	m	p	1,067
kidney, mushy	k	m	+	158
kidney, prickly	k	+	p	2,076
kidney	k	+	+	408
mushy, prickly	+	m	p	406
mushy	+	m	+	2,142
prickly	+	+	p	138
wildtype	+	+	+	1,005
TOTAL =				7,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes M and P during meiosis.

calculate the genetic distance between the two genes M and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

39.00000000 0.10000000 NUM

e71c_a9f1

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene T is associated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.
Gene W is affiliated with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.
Gene X is affiliated with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
tipsy, waxy, xanthic	t	w	x	361
tipsy, waxy	t	w	+	100
tipsy, xanthic	t	+	x	733
tipsy	t	+	+	1,836
waxy, xanthic	+	w	x	1,794
waxy	+	w	+	737
xanthic	+	+	x	110
wildtype	+	+	+	329
TOTAL =				6,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes W and X during meiosis.

calculate the genetic distance between the two genes W and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

28.00000000 0.10000000 NUM

c8fe_ab18

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is connected with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene D is affiliated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene X is connected with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
artsy, dewy, xanthic	a	d	x	957
artsy, dewy	a	d	+	30
artsy, xanthic	a	+	x	195
artsy	a	+	+	342
dewy, xanthic	+	d	x	348
dewy	+	d	+	165
xanthic	+	+	x	30
wildtype	+	+	+	933
TOTAL =				3,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and D during meiosis.

calculate the genetic distance between the two genes A and D, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

35.00000000 0.10000000 NUM

6ee4_116e

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is analogous to the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene B is correlated with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene M is related to the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

Phenotype	Genotypes			Progeny Count
artsy, bumpy, mushy	a	b	m	310
artsy, bumpy	a	b	+	2,031
artsy, mushy	a	+	m	764
artsy	a	+	+	37
bumpy, mushy	+	b	m	26
bumpy	+	b	+	748
mushy	+	+	m	2,064
wildtype	+	+	+	320
TOTAL =				6,300

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes B and M during meiosis.

calculate the genetic distance between the two genes B and M, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

11.00000000 0.10000000 NUM

51de_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene H is connected with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene K is related to the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene M is associated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

Phenotype	Genotypes			Progeny Count
horsey, kidney, mushy	h	k	m	2,009
horsey, kidney	h	k	+	710
horsey, mushy	h	+	m	301
horsey	h	+	+	28
kidney, mushy	+	k	m	32
kidney	+	k	+	299
mushy	+	+	m	730
wildtype	+	+	+	1,891
TOTAL =				6,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes H and M during meiosis.

calculate the genetic distance between the two genes H and M, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

21a8_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene J is analogous to the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene M is related to the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene P is analogous to the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
jerky, mushy, prickly	j	m	p	39
jerky, mushy	j	m	+	1,154
jerky, prickly	j	+	p	213
jerky	j	+	+	2,574
mushy, prickly	+	m	p	2,626
mushy	+	m	+	187
prickly	+	+	p	1,166
wildtype	+	+	+	41
TOTAL =				8,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes M and J during meiosis.

calculate the genetic distance between the two genes M and J, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

db20_30aa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is associated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene M is affiliated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene N is associated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.

Phenotype	Genotypes			Progeny Count
artsy, mushy, nerdy	a	m	n	41
artsy, mushy	a	m	+	948
artsy, nerdy	a	+	n	2,689
artsy	a	+	+	283
mushy, nerdy	+	m	n	270
mushy	+	m	+	2,683
nerdy	+	+	n	948
wildtype	+	+	+	38
TOTAL =				7,900

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and N during meiosis.

calculate the genetic distance between the two genes A and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

31.00000000 0.10000000 NUM

7fd3_f623

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene P is linked with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene T is analogous to the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.
Gene Y is related to the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
prickly, tipsy, yucky	p	t	y	8
prickly, tipsy	p	t	+	386
prickly, yucky	p	+	y	20
prickly	p	+	+	134
tipsy, yucky	+	t	y	119
tipsy	+	t	+	24
yucky	+	+	y	406
wildtype	+	+	+	3
TOTAL =				1,100

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes P and T during meiosis.

calculate the genetic distance between the two genes P and T, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

27.00000000 0.10000000 NUM

7a99_6d91

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene F is related to the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene T is connected with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.
Gene Y is linked with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
fuzzy, tipsy, yucky	f	t	y	35
fuzzy, tipsy	f	t	+	538
fuzzy, yucky	f	+	y	2,870
fuzzy	f	+	+	356
tipsy, yucky	+	t	y	328
tipsy	+	t	+	2,906
yucky	+	+	y	526
wildtype	+	+	+	41
TOTAL =				7,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes F and Y during meiosis.

calculate the genetic distance between the two genes F and Y, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

23.00000000 0.10000000 NUM

8b82_57c7

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is affiliated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene F is connected with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene R is linked with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
artsy, fuzzy, rusty	a	f	r	18
artsy, fuzzy	a	f	+	1,097
artsy, rusty	a	+	r	2,819
artsy	a	+	+	371
fuzzy, rusty	+	f	r	360
fuzzy	+	f	+	2,900
rusty	+	+	r	1,010
wildtype	+	+	+	25
TOTAL =				8,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes F and R during meiosis.

calculate the genetic distance between the two genes F and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

9.00000000 0.10000000 NUM

2bcf_070d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is linked with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene K is associated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene M is analogous to the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

Phenotype	Genotypes			Progeny Count
dewy, kidney, mushy	d	k	m	190
dewy, kidney	d	k	+	1,395
dewy, mushy	d	+	m	11
dewy	d	+	+	402
kidney, mushy	+	k	m	378
kidney	+	k	+	9
mushy	+	+	m	1,425
wildtype	+	+	+	190
TOTAL =				4,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes K and M during meiosis.

calculate the genetic distance between the two genes K and M, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

29.00000000 0.10000000 NUM

6bc8_f623

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene R is linked with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.
Gene T is affiliated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.
Gene X is affiliated with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
rusty, tipsy, xanthic	r	t	x	63
rusty, tipsy	r	t	+	208
rusty, xanthic	r	+	x	897
rusty	r	+	+	343
tipsy, xanthic	+	t	x	332
tipsy	+	t	+	828
xanthic	+	+	x	257
wildtype	+	+	+	72
TOTAL =				3,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes T and X during meiosis.

calculate the genetic distance between the two genes T and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

27.00000000 0.10000000 NUM

a8b0_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is related to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene E is related to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene M is correlated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

Phenotype	Genotypes			Progeny Count
chummy, eery, mushy	c	e	m	15
chummy, eery	c	e	+	901
chummy, mushy	c	+	m	3,403
chummy	c	+	+	260
eery, mushy	+	e	m	246
eery	+	e	+	3,451
mushy	+	+	m	893
wildtype	+	+	+	31
TOTAL =				9,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and M during meiosis.

calculate the genetic distance between the two genes C and M, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

c460_69f9

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is analogous to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene R is connected with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.
Gene T is associated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
chummy, rusty, tipsy	c	r	t	245
chummy, rusty	c	r	+	162
chummy, tipsy	c	+	t	28
chummy	c	+	+	693
rusty, tipsy	+	r	t	660
rusty	+	r	+	27
tipsy	+	+	t	135
wildtype	+	+	+	250
TOTAL =				2,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes T and R during meiosis.

calculate the genetic distance between the two genes T and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

16.00000000 0.10000000 NUM

cdf0_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is linked with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene E is affiliated with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene X is analogous to the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
dewy, eery, xanthic	d	e	x	287
dewy, eery	d	e	+	41
dewy, xanthic	d	+	x	690
dewy	d	+	+	3
eery, xanthic	+	e	x	7
eery	+	e	+	640
xanthic	+	+	x	29
wildtype	+	+	+	303
TOTAL =				2,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes X and E during meiosis.

calculate the genetic distance between the two genes X and E, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

ddc4_f623

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene J is affiliated with the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene M is correlated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene Y is affiliated with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
jerky, mushy, yucky	j	m	y	110
jerky, mushy	j	m	+	3,432
jerky, yucky	j	+	y	885
jerky	j	+	+	438
mushy, yucky	+	m	y	435
mushy	+	m	+	861
yucky	+	+	y	3,455
wildtype	+	+	+	84
TOTAL =				9,700

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes J and M during meiosis.

calculate the genetic distance between the two genes J and M, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

27.00000000 0.10000000 NUM

c6fa_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene K is associated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene N is associated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene W is connected with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
kidney, nerdy, waxy	k	n	w	1,179
kidney, nerdy	k	n	+	27
kidney, waxy	k	+	w	139
kidney	k	+	+	2,737
nerdy, waxy	+	n	w	2,716
nerdy	+	n	+	148
waxy	+	+	w	14
wildtype	+	+	+	1,240
TOTAL =				8,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes K and N during meiosis.

calculate the genetic distance between the two genes K and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

c387_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is related to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene D is analogous to the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene W is connected with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
chummy, dewy, waxy	c	d	w	621
chummy, dewy	c	d	+	1,155
chummy, waxy	c	+	w	202
chummy	c	+	+	2,574
dewy, waxy	+	d	w	2,624
dewy	+	d	+	212
waxy	+	+	w	1,191
wildtype	+	+	+	621
TOTAL =				9,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes W and D during meiosis.

calculate the genetic distance between the two genes W and D, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

0c87_8adc

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is connected with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene N is linked with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene R is affiliated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
artsy, nerdy, rusty	a	n	r	40
artsy, nerdy	a	n	+	395
artsy, rusty	a	+	r	685
artsy	a	+	+	1,876
nerdy, rusty	+	n	r	1,874
nerdy	+	n	+	665
rusty	+	+	r	415
wildtype	+	+	+	50
TOTAL =				6,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes N and A during meiosis.

calculate the genetic distance between the two genes N and A, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

15.00000000 0.10000000 NUM

d2c4_a9f1

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene J is analogous to the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene K is connected with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene T is analogous to the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
jerky, kidney, tipsy	j	k	t	162
jerky, kidney	j	k	+	15
jerky, tipsy	j	+	t	784
jerky	j	+	+	2,476
kidney, tipsy	+	k	t	2,386
kidney	+	k	+	814
tipsy	+	+	t	19
wildtype	+	+	+	144
TOTAL =				6,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes J and T during meiosis.

calculate the genetic distance between the two genes J and T, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

28.00000000 0.10000000 NUM

05a3_b913

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is correlated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene C is analogous to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene P is linked with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
artsy, chummy, prickly	a	c	p	821
artsy, chummy	a	c	+	135
artsy, prickly	a	+	p	19
artsy	a	+	+	392
chummy, prickly	+	c	p	406
chummy	+	c	+	23
prickly	+	+	p	131
wildtype	+	+	+	873
TOTAL =				2,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and P during meiosis.

calculate the genetic distance between the two genes A and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

38.00000000 0.10000000 NUM

5321_070d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is associated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene E is related to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene M is associated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

Phenotype	Genotypes			Progeny Count
chummy, eery, mushy	c	e	m	562
chummy, eery	c	e	+	79
chummy, mushy	c	+	m	187
chummy	c	+	+	5
eery, mushy	+	e	m	3
eery	+	e	+	125
mushy	+	+	m	73
wildtype	+	+	+	566
TOTAL =				1,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes E and M during meiosis.

calculate the genetic distance between the two genes E and M, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

29.00000000 0.10000000 NUM

7746_483d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is linked with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene F is affiliated with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene N is correlated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.

Phenotype	Genotypes			Progeny Count
artsy, fuzzy, nerdy	a	f	n	1,151
artsy, fuzzy	a	f	+	63
artsy, nerdy	a	+	n	2,546
artsy	a	+	+	274
fuzzy, nerdy	+	f	n	341
fuzzy	+	f	+	2,579
nerdy	+	+	n	60
wildtype	+	+	+	1,186
TOTAL =				8,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes F and N during meiosis.

calculate the genetic distance between the two genes F and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

36.00000000 0.10000000 NUM

a25d_c36d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene E is affiliated with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene P is connected with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene T is connected with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
eery, prickly, tipsy	e	p	t	1,425
eery, prickly	e	p	+	479
eery, tipsy	e	+	t	441
eery	e	+	+	125
prickly, tipsy	+	p	t	125
prickly	+	p	+	409
tipsy	+	+	t	521
wildtype	+	+	+	1,475
TOTAL =				5,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes P and E during meiosis.

calculate the genetic distance between the two genes P and E, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

22.00000000 0.10000000 NUM

4b4c_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene M is linked with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene N is analogous to the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene T is correlated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
mushy, nerdy, tipsy	m	n	t	543
mushy, nerdy	m	n	+	273
mushy, tipsy	m	+	t	2,076
mushy	m	+	+	54
nerdy, tipsy	+	n	t	63
nerdy	+	n	+	2,019
tipsy	+	+	t	312
wildtype	+	+	+	510
TOTAL =				5,850

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes T and N during meiosis.

calculate the genetic distance between the two genes T and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

ec60_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is linked with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene T is affiliated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.
Gene X is linked with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
bumpy, tipsy, xanthic	b	t	x	183
bumpy, tipsy	b	t	+	531
bumpy, xanthic	b	+	x	89
bumpy	b	+	+	12
tipsy, xanthic	+	t	x	4
tipsy	+	t	+	87
xanthic	+	+	x	493
wildtype	+	+	+	201
TOTAL =				1,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes T and X during meiosis.

calculate the genetic distance between the two genes T and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

55f4_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is affiliated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene H is affiliated with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene R is linked with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
dewy, horsey, rusty	d	h	r	150
dewy, horsey	d	h	+	1,075
dewy, rusty	d	+	r	416
dewy	d	+	+	4
horsey, rusty	+	h	r	12
horsey	+	h	+	368
rusty	+	+	r	1,053
wildtype	+	+	+	122
TOTAL =				3,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and H during meiosis.

calculate the genetic distance between the two genes D and H, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

544f_7d73

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene H is analogous to the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene K is correlated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene P is analogous to the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
horsey, kidney, prickly	h	k	p	978
horsey, kidney	h	k	+	2,690
horsey, prickly	h	+	p	410
horsey	h	+	+	69
kidney, prickly	+	k	p	54
kidney	+	k	+	369
prickly	+	+	p	2,681
wildtype	+	+	+	949
TOTAL =				8,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes H and P during meiosis.

calculate the genetic distance between the two genes H and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

33.00000000 0.10000000 NUM

f2d1_bf92

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is affiliated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene E is analogous to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene Y is correlated with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
artsy, eery, yucky	a	e	y	375
artsy, eery	a	e	+	30
artsy, yucky	a	+	y	117
artsy	a	+	+	919
eery, yucky	+	e	y	937
eery	+	e	+	115
yucky	+	+	y	28
wildtype	+	+	+	379
TOTAL =				2,900

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes E and Y during meiosis.

calculate the genetic distance between the two genes E and Y, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

10.00000000 0.10000000 NUM

2bfa_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene J is linked with the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene M is connected with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene P is affiliated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
jerky, mushy, prickly	j	m	p	79
jerky, mushy	j	m	+	178
jerky, prickly	j	+	p	571
jerky	j	+	+	6
mushy, prickly	+	m	p	11
mushy	+	m	+	602
prickly	+	+	p	179
wildtype	+	+	+	74
TOTAL =				1,700

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes J and M during meiosis.

calculate the genetic distance between the two genes J and M, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

a29e_935f

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is correlated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene H is related to the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene Y is related to the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
chummy, horsey, yucky	c	h	y	153
chummy, horsey	c	h	+	2,789
chummy, yucky	c	+	y	72
chummy	c	+	+	1,627
horsey, yucky	+	h	y	1,547
horsey	+	h	+	66
yucky	+	+	y	2,777
wildtype	+	+	+	169
TOTAL =				9,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and Y during meiosis.

calculate the genetic distance between the two genes C and Y, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

5.00000000 0.10000000 NUM

28b7_57c7

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is analogous to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene D is connected with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene H is connected with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.

Phenotype	Genotypes			Progeny Count
chummy, dewy, horsey	c	d	h	607
chummy, dewy	c	d	+	2,385
chummy, horsey	c	+	h	230
chummy	c	+	+	51
dewy, horsey	+	d	h	48
dewy	+	d	+	265
horsey	+	+	h	2,400
wildtype	+	+	+	614
TOTAL =				6,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and D during meiosis.

calculate the genetic distance between the two genes C and D, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

9.00000000 0.10000000 NUM

af88_b913

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is correlated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene B is linked with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene D is related to the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.

Phenotype	Genotypes			Progeny Count
artsy, bumpy, dewy	a	b	d	1,348
artsy, bumpy	a	b	+	42
artsy, dewy	a	+	d	2,428
artsy	a	+	+	164
bumpy, dewy	+	b	d	160
bumpy	+	b	+	2,513
dewy	+	+	d	39
wildtype	+	+	+	1,406
TOTAL =				8,100

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes B and D during meiosis.

calculate the genetic distance between the two genes B and D, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

38.00000000 0.10000000 NUM

8462_d38f

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene E is related to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene J is related to the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene T is affiliated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
eery, jerky, tipsy	e	j	t	825
eery, jerky	e	j	+	2,268
eery, tipsy	e	+	t	270
eery	e	+	+	47
jerky, tipsy	+	j	t	55
jerky	+	j	+	308
tipsy	+	+	t	2,254
wildtype	+	+	+	773
TOTAL =				6,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes E and T during meiosis.

calculate the genetic distance between the two genes E and T, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

32.00000000 0.10000000 NUM

5df9_4725

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene J is related to the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene R is correlated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.
Gene T is analogous to the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
jerky, rusty, tipsy	j	r	t	702
jerky, rusty	j	r	+	146
jerky, tipsy	j	+	t	1,543
jerky	j	+	+	45
rusty, tipsy	+	r	t	51
rusty	+	r	+	1,529
tipsy	+	+	t	142
wildtype	+	+	+	642
TOTAL =				4,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes J and T during meiosis.

calculate the genetic distance between the two genes J and T, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

8.00000000 0.10000000 NUM

ce56_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene E is related to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene N is affiliated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene T is correlated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
eery, nerdy, tipsy	e	n	t	535
eery, nerdy	e	n	+	25
eery, tipsy	e	+	t	197
eery	e	+	+	1,445
nerdy, tipsy	+	n	t	1,459
nerdy	+	n	+	199
tipsy	+	+	t	19
wildtype	+	+	+	521
TOTAL =				4,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes E and N during meiosis.

calculate the genetic distance between the two genes E and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

620a_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene F is connected with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene R is affiliated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.
Gene Y is associated with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
fuzzy, rusty, yucky	f	r	y	2,560
fuzzy, rusty	f	r	+	301
fuzzy, yucky	f	+	y	376
fuzzy	f	+	+	28
rusty, yucky	+	r	y	36
rusty	+	r	+	328
yucky	+	+	y	275
wildtype	+	+	+	2,496
TOTAL =				6,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes R and Y during meiosis.

calculate the genetic distance between the two genes R and Y, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

1976_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene R is connected with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.
Gene T is linked with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.
Gene W is analogous to the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
rusty, tipsy, waxy	r	t	w	10
rusty, tipsy	r	t	+	83
rusty, waxy	r	+	w	324
rusty	r	+	+	1,227
tipsy, waxy	+	t	w	1,340
tipsy	+	t	+	339
waxy	+	+	w	70
wildtype	+	+	+	7
TOTAL =				3,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes R and W during meiosis.

calculate the genetic distance between the two genes R and W, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000 NUM

c811_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is correlated with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene C is affiliated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene P is correlated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
bumpy, chummy, prickly	b	c	p	80
bumpy, chummy	b	c	+	10
bumpy, prickly	b	+	p	124
bumpy	b	+	+	322
chummy, prickly	+	c	p	327
chummy	+	c	+	129
prickly	+	+	p	12
wildtype	+	+	+	96
TOTAL =				1,100

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and P during meiosis.

calculate the genetic distance between the two genes C and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

8c2e_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is connected with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene K is correlated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene M is related to the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

Phenotype	Genotypes			Progeny Count
bumpy, kidney, mushy	b	k	m	299
bumpy, kidney	b	k	+	52
bumpy, mushy	b	+	m	1,645
bumpy	b	+	+	438
kidney, mushy	+	k	m	453
kidney	+	k	+	1,721
mushy	+	+	m	47
wildtype	+	+	+	295
TOTAL =				4,950

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes K and M during meiosis.

calculate the genetic distance between the two genes K and M, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

2917_2420

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is related to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene F is connected with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene Y is correlated with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
chummy, fuzzy, yucky	c	f	y	514
chummy, fuzzy	c	f	+	3,225
chummy, yucky	c	+	y	395
chummy	c	+	+	49
fuzzy, yucky	+	f	y	35
fuzzy	+	f	+	361
yucky	+	+	y	3,243
wildtype	+	+	+	578
TOTAL =				8,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes F and Y during meiosis.

calculate the genetic distance between the two genes F and Y, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

14.00000000 0.10000000 NUM

e29c_30aa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene M is affiliated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene T is associated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.
Gene X is linked with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
mushy, tipsy, xanthic	m	t	x	149
mushy, tipsy	m	t	+	501
mushy, xanthic	m	+	x	11
mushy	m	+	+	1,433
tipsy, xanthic	+	t	x	1,444
tipsy	+	t	+	10
xanthic	+	+	x	528
wildtype	+	+	+	124
TOTAL =				4,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes M and T during meiosis.

calculate the genetic distance between the two genes M and T, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

31.00000000 0.10000000 NUM

b021_69f9

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is related to the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene H is connected with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene R is correlated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
bumpy, horsey, rusty	b	h	r	635
bumpy, horsey	b	h	+	363
bumpy, rusty	b	+	r	1,639
bumpy	b	+	+	54
horsey, rusty	+	h	r	54
horsey	+	h	+	1,655
rusty	+	+	r	393
wildtype	+	+	+	607
TOTAL =				5,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes B and R during meiosis.

calculate the genetic distance between the two genes B and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

16.00000000 0.10000000 NUM

0ebb_69f9

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene F is analogous to the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene P is analogous to the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene R is associated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
fuzzy, prickly, rusty	f	p	r	13
fuzzy, prickly	f	p	+	1,557
fuzzy, rusty	f	+	r	105
fuzzy	f	+	+	165
prickly, rusty	+	p	r	177
prickly	+	p	+	129
rusty	+	+	r	1,449
wildtype	+	+	+	5
TOTAL =				3,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes F and P during meiosis.

calculate the genetic distance between the two genes F and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

16.00000000 0.10000000 NUM

fa76_30aa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is linked with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene X is analogous to the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.
Gene Y is connected with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
bumpy, xanthic, yucky	b	x	y	1,067
bumpy, xanthic	b	x	+	15
bumpy, yucky	b	+	y	2,895
bumpy	b	+	+	288
xanthic, yucky	+	x	y	258
xanthic	+	x	+	2,859
yucky	+	+	y	27
wildtype	+	+	+	991
TOTAL =				8,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes X and Y during meiosis.

calculate the genetic distance between the two genes X and Y, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

31.00000000 0.10000000 NUM

77e5_f623

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is correlated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene F is linked with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene M is correlated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

Phenotype	Genotypes			Progeny Count
dewy, fuzzy, mushy	d	f	m	11
dewy, fuzzy	d	f	+	80
dewy, mushy	d	+	m	171
dewy	d	+	+	643
fuzzy, mushy	+	f	m	644
fuzzy	+	f	+	162
mushy	+	+	m	73
wildtype	+	+	+	16
TOTAL =				1,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes F and M during meiosis.

calculate the genetic distance between the two genes F and M, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

27.00000000 0.10000000 NUM

b87f_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is analogous to the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene D is associated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene K is linked with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.

Phenotype	Genotypes			Progeny Count
bumpy, dewy, kidney	b	d	k	1,057
bumpy, dewy	b	d	+	2,522
bumpy, kidney	b	+	k	41
bumpy	b	+	+	610
dewy, kidney	+	d	k	680
dewy	+	d	+	45
kidney	+	+	k	2,638
wildtype	+	+	+	1,007
TOTAL =				8,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes B and K during meiosis.

calculate the genetic distance between the two genes B and K, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

cd52_f24b

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is connected with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene C is linked with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene T is analogous to the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
artsy, chummy, tipsy	a	c	t	97
artsy, chummy	a	c	+	925
artsy, tipsy	a	+	t	2,074
artsy	a	+	+	310
chummy, tipsy	+	c	t	311
chummy	+	c	+	2,135
tipsy	+	+	t	938
wildtype	+	+	+	110
TOTAL =				6,900

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and T during meiosis.

calculate the genetic distance between the two genes C and T, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

12.00000000 0.10000000 NUM

3d1c_c36d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is affiliated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene D is associated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene Y is related to the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
chummy, dewy, yucky	c	d	y	1,866
chummy, dewy	c	d	+	158
chummy, yucky	c	+	y	590
chummy	c	+	+	698
dewy, yucky	+	d	y	688
dewy	+	d	+	598
yucky	+	+	y	106
wildtype	+	+	+	1,896
TOTAL =				6,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes Y and D during meiosis.

calculate the genetic distance between the two genes Y and D, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

22.00000000 0.10000000 NUM

b868_83bd

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene H is linked with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene M is related to the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene N is linked with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.

Phenotype	Genotypes			Progeny Count
horsey, mushy, nerdy	h	m	n	2,263
horsey, mushy	h	m	+	111
horsey, nerdy	h	+	n	34
horsey	h	+	+	1,226
mushy, nerdy	+	m	n	1,256
mushy	+	m	+	39
nerdy	+	+	n	108
wildtype	+	+	+	2,263
TOTAL =				7,300

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes M and N during meiosis.

calculate the genetic distance between the two genes M and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

4.00000000 0.10000000 NUM

81c5_1506

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is analogous to the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene M is related to the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene N is correlated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.

Phenotype	Genotypes			Progeny Count
bumpy, mushy, nerdy	b	m	n	1,453
bumpy, mushy	b	m	+	11
bumpy, nerdy	b	+	n	274
bumpy	b	+	+	186
mushy, nerdy	+	m	n	175
mushy	+	m	+	277
nerdy	+	+	n	8
wildtype	+	+	+	1,416
TOTAL =				3,800

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes B and M during meiosis.

calculate the genetic distance between the two genes B and M, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

24.00000000 0.10000000 NUM

1aa8_483d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene H is analogous to the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene J is analogous to the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene Y is related to the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
horsey, jerky, yucky	h	j	y	237
horsey, jerky	h	j	+	1,229
horsey, yucky	h	+	y	68
horsey	h	+	+	485
jerky, yucky	+	j	y	495
jerky	+	j	+	72
yucky	+	+	y	1,191
wildtype	+	+	+	223
TOTAL =				4,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes J and Y during meiosis.

calculate the genetic distance between the two genes J and Y, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

36.00000000 0.10000000 NUM

ecd3_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is related to the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene E is analogous to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene Y is analogous to the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
artsy, eery, yucky	a	e	y	2,507
artsy, eery	a	e	+	245
artsy, yucky	a	+	y	904
artsy	a	+	+	40
eery, yucky	+	e	y	33
eery	+	e	+	848
yucky	+	+	y	266
wildtype	+	+	+	2,457
TOTAL =				7,300

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes E and A during meiosis.

calculate the genetic distance between the two genes E and A, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

9813_83bd

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene M is linked with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene W is analogous to the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.
Gene X is related to the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes			Progeny Count
mushy, waxy, xanthic	m	w	x	53
mushy, waxy	m	w	+	3,052
mushy, xanthic	m	+	x	1,319
mushy	m	+	+	146
waxy, xanthic	+	w	x	124
waxy	+	w	+	1,291
xanthic	+	+	x	2,978
wildtype	+	+	+	37
TOTAL =				9,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes X and W during meiosis.

calculate the genetic distance between the two genes X and W, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

4.00000000 0.10000000 NUM

7e90_e6c1

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene M is connected with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene T is related to the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.
Gene W is connected with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
mushy, tipsy, waxy	m	t	w	165
mushy, tipsy	m	t	+	309
mushy, waxy	m	+	w	17
mushy	m	+	+	7
tipsy, waxy	+	t	w	8
tipsy	+	t	+	18
waxy	+	+	w	306
wildtype	+	+	+	170
TOTAL =				1,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes M and W during meiosis.

calculate the genetic distance between the two genes M and W, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

37.00000000 0.10000000 NUM

d29b_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is connected with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene C is analogous to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene K is related to the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.

Phenotype	Genotypes			Progeny Count
bumpy, chummy, kidney	b	c	k	89
bumpy, chummy	b	c	+	33
bumpy, kidney	b	+	k	2,141
bumpy	b	+	+	888
chummy, kidney	+	c	k	939
chummy	+	c	+	2,080
kidney	+	+	k	30
wildtype	+	+	+	100
TOTAL =				6,300

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes B and K during meiosis.

calculate the genetic distance between the two genes B and K, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

19e7_69f9

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene K is linked with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene M is correlated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene R is affiliated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
kidney, mushy, rusty	k	m	r	517
kidney, mushy	k	m	+	83
kidney, rusty	k	+	r	250
kidney	k	+	+	1,200
mushy, rusty	+	m	r	1,207
mushy	+	m	+	248
rusty	+	+	r	83
wildtype	+	+	+	562
TOTAL =				4,150

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes M and R during meiosis.

calculate the genetic distance between the two genes M and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

16.00000000 0.10000000 NUM

21c9_bf92

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is correlated with the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene K is related to the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene W is associated with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
bumpy, kidney, waxy	b	k	w	1,222
bumpy, kidney	b	k	+	49
bumpy, waxy	b	+	w	366
bumpy	b	+	+	2,621
kidney, waxy	+	k	w	2,625
kidney	+	k	+	408
waxy	+	+	w	37
wildtype	+	+	+	1,272
TOTAL =				8,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes K and W during meiosis.

calculate the genetic distance between the two genes K and W, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

10.00000000 0.10000000 NUM

3bee_57c7

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene B is related to the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.
Gene C is linked with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene F is related to the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.

Phenotype	Genotypes			Progeny Count
bumpy, chummy, fuzzy	b	c	f	305
bumpy, chummy	b	c	+	2,604
bumpy, fuzzy	b	+	f	59
bumpy	b	+	+	1,130
chummy, fuzzy	+	c	f	1,207
chummy	+	c	+	64
fuzzy	+	+	f	2,521
wildtype	+	+	+	310
TOTAL =				8,200

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes B and F during meiosis.

calculate the genetic distance between the two genes B and F, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

9.00000000 0.10000000 NUM

2f95_17ef

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is analogous to the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene K is analogous to the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene P is affiliated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
dewy, kidney, prickly	d	k	p	94
dewy, kidney	d	k	+	23
dewy, prickly	d	+	p	853
dewy	d	+	+	1,396
kidney, prickly	+	k	p	1,424
kidney	+	k	+	792
prickly	+	+	p	24
wildtype	+	+	+	94
TOTAL =				4,700

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and P during meiosis.

calculate the genetic distance between the two genes D and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

39.00000000 0.10000000 NUM

156e_b913

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is correlated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene E is related to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene N is connected with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.

Phenotype	Genotypes			Progeny Count
dewy, eery, nerdy	d	e	n	2,370
dewy, eery	d	e	+	1,229
dewy, nerdy	d	+	n	82
dewy	d	+	+	334
eery, nerdy	+	e	n	314
eery	+	e	+	80
nerdy	+	+	n	1,201
wildtype	+	+	+	2,490
TOTAL =				8,100

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes D and N during meiosis.

calculate the genetic distance between the two genes D and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

38.00000000 0.10000000 NUM

76a7_1506

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is connected with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene E is analogous to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene T is affiliated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
chummy, eery, tipsy	c	e	t	69
chummy, eery	c	e	+	3
chummy, tipsy	c	+	t	50
chummy	c	+	+	369
eery, tipsy	+	e	t	386
eery	+	e	+	45
tipsy	+	+	t	2
wildtype	+	+	+	76
TOTAL =				1,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes C and T during meiosis.

calculate the genetic distance between the two genes C and T, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

24.00000000 0.10000000 NUM

e82d_bf92

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene M is linked with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.
Gene P is correlated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene R is connected with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes			Progeny Count
mushy, prickly, rusty	m	p	r	540
mushy, prickly	m	p	+	31
mushy, rusty	m	+	r	238
mushy	m	+	+	2,008
prickly, rusty	+	p	r	1,968
prickly	+	p	+	266
rusty	+	+	r	25
wildtype	+	+	+	524
TOTAL =				5,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes P and R during meiosis.

calculate the genetic distance between the two genes P and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

10.00000000 0.10000000 NUM

44bb_bf92

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene F is associated with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene J is associated with the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene W is correlated with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
fuzzy, jerky, waxy	f	j	w	66
fuzzy, jerky	f	j	+	352
fuzzy, waxy	f	+	w	3,054
fuzzy	f	+	+	788
jerky, waxy	+	j	w	803
jerky	+	j	+	3,095
waxy	+	+	w	379
wildtype	+	+	+	63
TOTAL =				8,600

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes F and J during meiosis.

calculate the genetic distance between the two genes F and J, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

10.00000000 0.10000000 NUM

ab0e_4725

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene H is associated with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene N is affiliated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene W is related to the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
horsey, nerdy, waxy	h	n	w	149
horsey, nerdy	h	n	+	440
horsey, waxy	h	+	w	4
horsey	h	+	+	52
nerdy, waxy	+	n	w	39
nerdy	+	n	+	9
waxy	+	+	w	444
wildtype	+	+	+	163
TOTAL =				1,300

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes N and H during meiosis.

calculate the genetic distance between the two genes N and H, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

8.00000000 0.10000000 NUM

6e2c_c36d

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene F is correlated with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene R is linked with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.
Gene W is linked with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes			Progeny Count
fuzzy, rusty, waxy	f	r	w	959
fuzzy, rusty	f	r	+	11
fuzzy, waxy	f	+	w	106
fuzzy	f	+	+	141
rusty, waxy	+	r	w	184
rusty	+	r	+	119
waxy	+	+	w	14
wildtype	+	+	+	966
TOTAL =				2,500

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes F and R during meiosis.

calculate the genetic distance between the two genes F and R, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

22.00000000 0.10000000 NUM

0ac7_9e56

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene C is connected with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene K is connected with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene P is correlated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
chummy, kidney, prickly	c	k	p	303
chummy, kidney	c	k	+	2,379
chummy, prickly	c	+	p	34
chummy	c	+	+	721
kidney, prickly	+	k	p	749
kidney	+	k	+	36
prickly	+	+	p	2,451
wildtype	+	+	+	327
TOTAL =				7,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes K and P during meiosis.

calculate the genetic distance between the two genes K and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

30.00000000 0.10000000 NUM

c967_2420

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene P is associated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene X is associated with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.
Gene Y is correlated with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes			Progeny Count
prickly, xanthic, yucky	p	x	y	119
prickly, xanthic	p	x	+	150
prickly, yucky	p	+	y	14
prickly	p	+	+	870
xanthic, yucky	+	x	y	901
xanthic	+	x	+	9
yucky	+	+	y	149
wildtype	+	+	+	88
TOTAL =				2,300

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes Y and X during meiosis.

calculate the genetic distance between the two genes Y and X, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

14.00000000 0.10000000 NUM

0ba7_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene D is associated with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene F is correlated with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene M is affiliated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

Phenotype	Genotypes			Progeny Count
dewy, fuzzy, mushy	d	f	m	43
dewy, fuzzy	d	f	+	959
dewy, mushy	d	+	m	328
dewy	d	+	+	2,761
fuzzy, mushy	+	f	m	2,666
fuzzy	+	f	+	320
mushy	+	+	m	985
wildtype	+	+	+	38
TOTAL =				8,100

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes F and D during meiosis.

calculate the genetic distance between the two genes F and D, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

0c70_bbfa

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene A is correlated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.
Gene H is associated with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene P is related to the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes			Progeny Count
artsy, horsey, prickly	a	h	p	1,831
artsy, horsey	a	h	+	694
artsy, prickly	a	+	p	559
artsy	a	+	+	106
horsey, prickly	+	h	p	118
horsey	+	h	+	561
prickly	+	+	p	682
wildtype	+	+	+	1,849
TOTAL =				6,400

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes A and P during meiosis.

calculate the genetic distance between the two genes A and P, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

25.00000000 0.10000000 NUM

b796_8eb4

Three-Point Test Cross Problem

A standard three-point test cross involves crossing a heterozygous organism for all three genes with an organism that is homozygous recessive for all three genes

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for three genes was conducted to understand their genetic interactions.

Characteristics of Recessive Phenotypes

Gene N is associated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene P is related to the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene T is related to the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes			Progeny Count
nerdy, prickly, tipsy	n	p	t	15
nerdy, prickly	n	p	+	612
nerdy, tipsy	n	+	t	425
nerdy	n	+	+	1,969
prickly, tipsy	+	p	t	1,961
prickly	+	p	+	445
tipsy	+	+	t	558
wildtype	+	+	+	15
TOTAL =				6,000

The resulting phenotypes are summarized in the table above.

Question

With the progeny data from the table, and using only the genotypes that result from crossover events between the two genes P and N during meiosis.

calculate the genetic distance between the two genes P and N, expressing your answer in centimorgans (cM)

Important Answer Guidelines

Important Tip 1: Your calculated distance between the pair of genes should be a whole number. Finding a decimal in your answer, such as 5.5, indicates a mistake was made. Please provide your answer as a complete number without fractions or decimals.
Important Tip 2: Your answer should be written as a numerical value only, with no spaces, commas, or units such as "cM" or "map units". For example, if the distance is fifty one centimorgans, simply write "51".

20.00000000 0.10000000