44f6_b2bd

Two-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 two-point test cross examines two (2) genes at the same time to learn about their assortment in gamete formation.

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
kidney, yucky	k	y	313
kidney	k	+	1,975
yucky	+	y	1,981
wildtype	+	+	331
TOTAL =			4,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

Using the data presented in the table to determine the configuration of the alleles on the parental chromosomes. Determine whether the alleles for the two genes are in a cis (on the same chromosome) or trans (on different chromosomes) configuration.

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

287a_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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
tipsy, xanthic	t	x	176
tipsy	t	+	1,341
xanthic	+	x	1,299
wildtype	+	+	184
TOTAL =			3,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

7bd1_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
artsy, rusty	a	r	1,700
artsy	a	+	226
rusty	+	r	230
wildtype	+	+	1,644
TOTAL =			3,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

7252_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
rusty, waxy	r	w	2,582
rusty	r	+	352
waxy	+	w	344
wildtype	+	+	2,522
TOTAL =			5,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

cc49_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
artsy, jerky	a	j	2,414
artsy	a	+	1,182
jerky	+	j	1,194
wildtype	+	+	2,410
TOTAL =			7,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

6464_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
horsey, yucky	h	y	866
horsey	h	+	431
yucky	+	y	427
wildtype	+	+	876
TOTAL =			2,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

a9f0_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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, jerky	a	j	625
artsy	a	+	1,111
jerky	+	j	1,065
wildtype	+	+	599
TOTAL =			3,400

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

0125_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
eery, fuzzy	e	f	2,988
eery	e	+	1,022
fuzzy	+	f	978
wildtype	+	+	3,012
TOTAL =			8,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

09ab_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
chummy, rusty	c	r	154
chummy	c	+	433
rusty	+	r	479
wildtype	+	+	134
TOTAL =			1,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

4b35_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
bumpy, mushy	b	m	250
bumpy	b	+	1,568
mushy	+	m	1,528
wildtype	+	+	254
TOTAL =			3,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

b866_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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, tipsy	a	t	3,458
artsy	a	+	1,018
tipsy	+	t	1,052
wildtype	+	+	3,472
TOTAL =			9,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

fd15_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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, prickly	a	p	34
artsy	a	+	571
prickly	+	p	569
wildtype	+	+	26
TOTAL =			1,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

71ad_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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, tipsy	a	t	1,219
artsy	a	+	416
tipsy	+	t	384
wildtype	+	+	1,181
TOTAL =			3,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

9314_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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, yucky	c	y	4,050
chummy	c	+	529
yucky	+	y	575
wildtype	+	+	4,046
TOTAL =			9,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

c920_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
chummy, dewy	c	d	1,728
chummy	c	+	2,634
dewy	+	d	2,646
wildtype	+	+	1,792
TOTAL =			8,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

974b_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
kidney, rusty	k	r	465
kidney	k	+	1,602
rusty	+	r	1,632
wildtype	+	+	501
TOTAL =			4,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

14b1_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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, waxy	r	w	4,287
rusty	r	+	474
waxy	+	w	486
wildtype	+	+	4,353
TOTAL =			9,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

576e_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
bumpy, chummy	b	c	2,020
bumpy	b	+	714
chummy	+	c	690
wildtype	+	+	1,976
TOTAL =			5,400

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

45cb_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
nerdy, waxy	n	w	1,877
nerdy	n	+	2,879
waxy	+	w	2,761
wildtype	+	+	1,883
TOTAL =			9,400

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

5b86_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
horsey, mushy	h	m	593
horsey	h	+	1,067
mushy	+	m	1,109
wildtype	+	+	631
TOTAL =			3,400

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

8c7e_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
rusty, xanthic	r	x	1,270
rusty	r	+	369
xanthic	+	x	367
wildtype	+	+	1,194
TOTAL =			3,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

9221_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
jerky, nerdy	j	n	714
jerky	j	+	3,791
nerdy	+	n	3,769
wildtype	+	+	726
TOTAL =			9,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

4a4d_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
artsy, mushy	a	m	3,773
artsy	a	+	560
mushy	+	m	558
wildtype	+	+	3,709
TOTAL =			8,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

965a_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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, fuzzy	a	f	2,006
artsy	a	+	744
fuzzy	+	f	824
wildtype	+	+	2,026
TOTAL =			5,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

7478_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
chummy, fuzzy	c	f	894
chummy	c	+	1,592
fuzzy	+	f	1,608
wildtype	+	+	906
TOTAL =			5,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

469e_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
kidney, prickly	k	p	489
kidney	k	+	86
prickly	+	p	70
wildtype	+	+	555
TOTAL =			1,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

6d11_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
rusty, yucky	r	y	723
rusty	r	+	1,720
yucky	+	y	1,688
wildtype	+	+	669
TOTAL =			4,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

59c6_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
bumpy, mushy	b	m	177
bumpy	b	+	630
mushy	+	m	586
wildtype	+	+	207
TOTAL =			1,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

32b0_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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.

Phenotype	Genotypes		Progeny Count
eery, fuzzy	e	f	208
eery	e	+	1,277
fuzzy	+	f	1,273
wildtype	+	+	242
TOTAL =			3,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

a8de_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
mushy, nerdy	m	n	28
mushy	m	+	1,406
nerdy	+	n	1,338
wildtype	+	+	28
TOTAL =			2,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

da83_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
dewy, horsey	d	h	1,533
dewy	d	+	82
horsey	+	h	78
wildtype	+	+	1,507
TOTAL =			3,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

a4d3_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
kidney, xanthic	k	x	1,221
kidney	k	+	2,238
xanthic	+	x	2,312
wildtype	+	+	1,229
TOTAL =			7,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

6ada_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
bumpy, dewy	b	d	73
bumpy	b	+	1,720
dewy	+	d	1,736
wildtype	+	+	71
TOTAL =			3,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

c73a_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
eery, yucky	e	y	3,759
eery	e	+	801
yucky	+	y	729
wildtype	+	+	3,711
TOTAL =			9,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

fa87_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
kidney, nerdy	k	n	235
kidney	k	+	1,844
nerdy	+	n	1,894
wildtype	+	+	227
TOTAL =			4,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

c51d_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
artsy, rusty	a	r	3,313
artsy	a	+	1,305
rusty	+	r	1,271
wildtype	+	+	3,311
TOTAL =			9,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

59b8_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
prickly, rusty	p	r	1,106
prickly	p	+	2,067
rusty	+	r	2,093
wildtype	+	+	1,134
TOTAL =			6,400

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

6f69_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
eery, yucky	e	y	769
eery	e	+	349
yucky	+	y	311
wildtype	+	+	771
TOTAL =			2,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

6c1c_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
jerky, tipsy	j	t	3,093
jerky	j	+	1,001
tipsy	+	t	967
wildtype	+	+	3,139
TOTAL =			8,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

eafd_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
bumpy, jerky	b	j	908
bumpy	b	+	2,906
jerky	+	j	2,870
wildtype	+	+	916
TOTAL =			7,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

e560_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
horsey, rusty	h	r	887
horsey	h	+	3,824
rusty	+	r	3,628
wildtype	+	+	861
TOTAL =			9,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

31c4_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
dewy, horsey	d	h	860
dewy	d	+	543
horsey	+	h	549
wildtype	+	+	848
TOTAL =			2,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

5470_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
chummy, xanthic	c	x	2,661
chummy	c	+	1,018
xanthic	+	x	1,054
wildtype	+	+	2,667
TOTAL =			7,400

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

b22a_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
bumpy, chummy	b	c	1,393
bumpy	b	+	2,114
chummy	+	c	2,086
wildtype	+	+	1,407
TOTAL =			7,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

9c62_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
horsey, mushy	h	m	185
horsey	h	+	691
mushy	+	m	713
wildtype	+	+	211
TOTAL =			1,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

ead7_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
waxy, xanthic	w	x	1,891
waxy	w	+	630
xanthic	+	x	618
wildtype	+	+	2,061
TOTAL =			5,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

de19_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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, yucky	c	y	1,204
chummy	c	+	1,815
yucky	+	y	1,785
wildtype	+	+	1,196
TOTAL =			6,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

198a_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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
xanthic, yucky	x	y	377
xanthic	x	+	3,594
yucky	+	y	3,868
wildtype	+	+	361
TOTAL =			8,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

f6df_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
horsey, waxy	h	w	190
horsey	h	+	407
waxy	+	w	397
wildtype	+	+	206
TOTAL =			1,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

7569_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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, nerdy	b	n	2,773
bumpy	b	+	661
nerdy	+	n	699
wildtype	+	+	2,667
TOTAL =			6,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

57e7_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
dewy, horsey	d	h	916
dewy	d	+	3,001
horsey	+	h	3,005
wildtype	+	+	878
TOTAL =			7,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

d7f3_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
kidney, xanthic	k	x	578
kidney	k	+	1,481
xanthic	+	x	1,543
wildtype	+	+	598
TOTAL =			4,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

9f9b_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
fuzzy, rusty	f	r	914
fuzzy	f	+	3,032
rusty	+	r	3,048
wildtype	+	+	1,006
TOTAL =			8,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

9a4c_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
horsey, yucky	h	y	137
horsey	h	+	364
yucky	+	y	356
wildtype	+	+	143
TOTAL =			1,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

3f1d_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
bumpy, tipsy	b	t	1,032
bumpy	b	+	409
tipsy	+	t	403
wildtype	+	+	956
TOTAL =			2,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

aaea_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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, rusty	m	r	365
mushy	m	+	2,931
rusty	+	r	2,943
wildtype	+	+	361
TOTAL =			6,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

3d46_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
kidney, waxy	k	w	964
kidney	k	+	211
waxy	+	w	221
wildtype	+	+	1,004
TOTAL =			2,400

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

351f_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
nerdy, prickly	n	p	2,963
nerdy	n	+	195
prickly	+	p	177
wildtype	+	+	2,865
TOTAL =			6,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

a69c_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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, rusty	a	r	791
artsy	a	+	330
rusty	+	r	330
wildtype	+	+	749
TOTAL =			2,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

dd8f_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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, rusty	d	r	504
dewy	d	+	3,368
rusty	+	r	3,244
wildtype	+	+	484
TOTAL =			7,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

5d23_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
bumpy, chummy	b	c	4,268
bumpy	b	+	439
chummy	+	c	407
wildtype	+	+	4,286
TOTAL =			9,400

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

2e78_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
chummy, horsey	c	h	872
chummy	c	+	224
horsey	+	h	238
wildtype	+	+	866
TOTAL =			2,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

e84d_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
artsy, horsey	a	h	504
artsy	a	+	2,157
horsey	+	h	2,055
wildtype	+	+	484
TOTAL =			5,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

cbab_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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, waxy	r	w	896
rusty	r	+	3,001
waxy	+	w	3,005
wildtype	+	+	898
TOTAL =			7,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

faf3_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
dewy, rusty	d	r	188
dewy	d	+	529
rusty	+	r	493
wildtype	+	+	190
TOTAL =			1,400

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

5e09_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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, waxy	f	w	2,355
fuzzy	f	+	907
waxy	+	w	941
wildtype	+	+	2,397
TOTAL =			6,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

09c7_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
fuzzy, kidney	f	k	509
fuzzy	f	+	883
kidney	+	k	881
wildtype	+	+	527
TOTAL =			2,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

0233_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
chummy, kidney	c	k	368
chummy	c	+	1,144
kidney	+	k	1,106
wildtype	+	+	382
TOTAL =			3,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

bd36_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
nerdy, prickly	n	p	287
nerdy	n	+	1,126
prickly	+	p	1,142
wildtype	+	+	245
TOTAL =			2,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

fa80_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
tipsy, yucky	t	y	1,440
tipsy	t	+	27
yucky	+	y	29
wildtype	+	+	1,304
TOTAL =			2,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

38a7_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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, yucky	p	y	615
prickly	p	+	205
yucky	+	y	195
wildtype	+	+	585
TOTAL =			1,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

5a43_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
waxy, yucky	w	y	1,905
waxy	w	+	33
yucky	+	y	43
wildtype	+	+	1,819
TOTAL =			3,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

7102_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
tipsy, waxy	t	w	4,167
tipsy	t	+	445
waxy	+	w	475
wildtype	+	+	4,113
TOTAL =			9,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

232c_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
fuzzy, xanthic	f	x	533
fuzzy	f	+	3,470
xanthic	+	x	3,490
wildtype	+	+	507
TOTAL =			8,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

6459_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
bumpy, yucky	b	y	108
bumpy	b	+	1,381
yucky	+	y	1,409
wildtype	+	+	102
TOTAL =			3,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

1444_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
fuzzy, nerdy	f	n	382
fuzzy	f	+	960
nerdy	+	n	912
wildtype	+	+	346
TOTAL =			2,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

d4b3_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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.
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
waxy, xanthic	w	x	1,520
waxy	w	+	1,000
xanthic	+	x	1,000
wildtype	+	+	1,480
TOTAL =			5,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

b946_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
horsey, xanthic	h	x	967
horsey	h	+	3,401
xanthic	+	x	3,307
wildtype	+	+	925
TOTAL =			8,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

665b_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
artsy, dewy	a	d	2,227
artsy	a	+	90
dewy	+	d	94
wildtype	+	+	2,189
TOTAL =			4,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

0846_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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
xanthic, yucky	x	y	268
xanthic	x	+	529
yucky	+	y	511
wildtype	+	+	292
TOTAL =			1,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

bbb4_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
jerky, xanthic	j	x	2,807
jerky	j	+	1,635
xanthic	+	x	1,533
wildtype	+	+	2,825
TOTAL =			8,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

f888_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
bumpy, horsey	b	h	1,256
bumpy	b	+	650
horsey	+	h	718
wildtype	+	+	1,176
TOTAL =			3,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

e891_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
chummy, fuzzy	c	f	3,275
chummy	c	+	1,318
fuzzy	+	f	1,202
wildtype	+	+	3,205
TOTAL =			9,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

11d1_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
prickly, waxy	p	w	96
prickly	p	+	1,808
waxy	+	w	1,802
wildtype	+	+	94
TOTAL =			3,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

fff5_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
dewy, jerky	d	j	1,680
dewy	d	+	1,028
jerky	+	j	1,100
wildtype	+	+	1,792
TOTAL =			5,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

e1e6_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
eery, kidney	e	k	1,167
eery	e	+	158
kidney	+	k	180
wildtype	+	+	1,095
TOTAL =			2,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

e202_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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.

Phenotype	Genotypes		Progeny Count
chummy, horsey	c	h	1,132
chummy	c	+	784
horsey	+	h	736
wildtype	+	+	1,148
TOTAL =			3,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

dc67_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
rusty, yucky	r	y	1,619
rusty	r	+	953
yucky	+	y	971
wildtype	+	+	1,657
TOTAL =			5,200

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

672b_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
fuzzy, xanthic	f	x	353
fuzzy	f	+	551
xanthic	+	x	547
wildtype	+	+	349
TOTAL =			1,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

18aa_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
chummy, rusty	c	r	1,589
chummy	c	+	796
rusty	+	r	836
wildtype	+	+	1,579
TOTAL =			4,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

1165_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
kidney, waxy	k	w	3,009
kidney	k	+	1,561
waxy	+	w	1,499
wildtype	+	+	2,931
TOTAL =			9,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

51b7_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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.

Phenotype	Genotypes		Progeny Count
dewy, horsey	d	h	489
dewy	d	+	911
horsey	+	h	909
wildtype	+	+	491
TOTAL =			2,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

33bd_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
dewy, tipsy	d	t	2,943
dewy	d	+	410
tipsy	+	t	406
wildtype	+	+	3,041
TOTAL =			6,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

590e_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
prickly, rusty	p	r	2,705
prickly	p	+	374
rusty	+	r	394
wildtype	+	+	2,927
TOTAL =			6,400

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

29bf_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
horsey, kidney	h	k	809
horsey	h	+	3,463
kidney	+	k	3,503
wildtype	+	+	825
TOTAL =			8,600

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

8d62_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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 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
jerky, rusty	j	r	3,889
jerky	j	+	592
rusty	+	r	640
wildtype	+	+	3,679
TOTAL =			8,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

10dd_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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.

Phenotype	Genotypes		Progeny Count
rusty, tipsy	r	t	3,158
rusty	r	+	317
tipsy	+	t	313
wildtype	+	+	3,212
TOTAL =			7,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

2437_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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
mushy, prickly	m	p	370
mushy	m	+	1,499
prickly	+	p	1,579
wildtype	+	+	352
TOTAL =			3,800

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Incorrect B. trans Correct C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect MC

9227_b2bd

Two-Point Test Cross Problem

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

For this problem, a test cross using a fruit fly (Drosophila melanogaster) heterozygous for two 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 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, jerky	e	j	467
eery	e	+	39
jerky	+	j	41
wildtype	+	+	453
TOTAL =			1,000

The resulting phenotypes are summarized in the table above.

The phenotype counts resulting from the cross are summarized in the table above.

Question

A. cis Correct B. trans Incorrect C. both Incorrect D. neither Incorrect E. cannot be determined Incorrect