e4f0_7feb

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 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 R is linked with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes		Progeny Count
eery, rusty	e	r	1,030
eery	e	+	2,822
rusty	+	r	2,802
wildtype	+	+	946
TOTAL =			7,600

The resulting phenotypes are summarized in the table above.

Question

Review the phenotype counts shown in the table. Based on the traits expressed in the offspring, identify the possible parental genotype combinations. These are the allele combinations that the parent fruit flies originally carried. More than one combination will be correct. Select all that apply.

A. er Incorrect B. e+ Correct C. +r Correct D. ++ Incorrect MA

cb93_7c3a

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 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
horsey, waxy	h	w	1,239
horsey	h	+	2,132
waxy	+	w	2,220
wildtype	+	+	1,209
TOTAL =			6,800

The resulting phenotypes are summarized in the table above.

Question

A. hw Incorrect B. h+ Correct C. +w Correct D. ++ Incorrect MA

bc10_bd8a

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

Phenotype	Genotypes		Progeny Count
mushy, waxy	m	w	1,001
mushy	m	+	2,947
waxy	+	w	2,903
wildtype	+	+	949
TOTAL =			7,800

The resulting phenotypes are summarized in the table above.

Question

A. mw Incorrect B. m+ Correct C. +w Correct D. ++ Incorrect MA

99c1_a0c8

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 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.

Phenotype	Genotypes		Progeny Count
dewy, jerky	d	j	116
dewy	d	+	2,027
jerky	+	j	1,921
wildtype	+	+	136
TOTAL =			4,200

The resulting phenotypes are summarized in the table above.

Question

A. dj Incorrect B. d+ Correct C. +j Correct D. ++ Incorrect MA

a2f6_bfee

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 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
kidney, mushy	k	m	588
kidney	k	+	955
mushy	+	m	905
wildtype	+	+	552
TOTAL =			3,000

The resulting phenotypes are summarized in the table above.

Question

A. km Incorrect B. k+ Correct C. +m Correct D. ++ Incorrect MA

1d48_2bcd

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 connected with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene T is 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
eery, tipsy	e	t	332
eery	e	+	791
tipsy	+	t	727
wildtype	+	+	350
TOTAL =			2,200

The resulting phenotypes are summarized in the table above.

Question

A. et Incorrect B. e+ Correct C. +t Correct D. ++ Incorrect MA

ab64_7492

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 associated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.
Gene X is affiliated with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes		Progeny Count
tipsy, xanthic	t	x	968
tipsy	t	+	3,489
xanthic	+	x	3,687
wildtype	+	+	1,056
TOTAL =			9,200

The resulting phenotypes are summarized in the table above.

Question

A. tx Incorrect B. t+ Correct C. +x Correct D. ++ Incorrect MA

6006_1c1b

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 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
dewy, xanthic	d	x	1,777
dewy	d	+	1,034
xanthic	+	x	1,094
wildtype	+	+	1,695
TOTAL =			5,600

The resulting phenotypes are summarized in the table above.

Question

A. dx Correct B. d+ Incorrect C. +x Incorrect D. ++ Correct MA

976e_d6d2

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 associated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene R is 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	1,158
prickly	p	+	687
rusty	+	r	645
wildtype	+	+	1,110
TOTAL =			3,600

The resulting phenotypes are summarized in the table above.

Question

A. pr Correct B. p+ Incorrect C. +r Incorrect D. ++ Correct MA

9216_579c

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 K is associated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.

Phenotype	Genotypes		Progeny Count
chummy, kidney	c	k	1,325
chummy	c	+	598
kidney	+	k	580
wildtype	+	+	1,297
TOTAL =			3,800

The resulting phenotypes are summarized in the table above.

Question

A. ck Correct B. c+ Incorrect C. +k Incorrect D. ++ Correct MA

e29e_c806

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 K is related to the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.

Phenotype	Genotypes		Progeny Count
bumpy, kidney	b	k	518
bumpy	b	+	164
kidney	+	k	172
wildtype	+	+	546
TOTAL =			1,400

The resulting phenotypes are summarized in the table above.

Question

A. bk Correct B. b+ Incorrect C. +k Incorrect D. ++ Correct MA

e577_0884

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 linked with the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.
Gene 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
dewy, fuzzy	d	f	2,099
dewy	d	+	939
fuzzy	+	f	861
wildtype	+	+	2,101
TOTAL =			6,000

The resulting phenotypes are summarized in the table above.

Question

A. df Correct B. d+ Incorrect C. +f Incorrect D. ++ Correct MA

2956_75e7

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 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	951
artsy	a	+	393
tipsy	+	t	335
wildtype	+	+	921
TOTAL =			2,600

The resulting phenotypes are summarized in the table above.

Question

A. at Correct B. a+ Incorrect C. +t Incorrect D. ++ Correct MA

f4e3_f05d

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

Phenotype	Genotypes		Progeny Count
mushy, prickly	m	p	788
mushy	m	+	1,790
prickly	+	p	1,798
wildtype	+	+	824
TOTAL =			5,200

The resulting phenotypes are summarized in the table above.

Question

A. mp Incorrect B. m+ Correct C. +p Correct D. ++ Incorrect MA

4cf4_70e1

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 linked with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene W is affiliated with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes		Progeny Count
chummy, waxy	c	w	1,452
chummy	c	+	735
waxy	+	w	805
wildtype	+	+	1,408
TOTAL =			4,400

The resulting phenotypes are summarized in the table above.

Question

A. cw Correct B. c+ Incorrect C. +w Incorrect D. ++ Correct MA

111c_cf64

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 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
fuzzy, rusty	f	r	879
fuzzy	f	+	3,985
rusty	+	r	3,887
wildtype	+	+	849
TOTAL =			9,600

The resulting phenotypes are summarized in the table above.

Question

A. fr Incorrect B. f+ Correct C. +r Correct D. ++ Incorrect MA

2f25_7c3a

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 W is affiliated with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes		Progeny Count
horsey, waxy	h	w	478
horsey	h	+	945
waxy	+	w	903
wildtype	+	+	474
TOTAL =			2,800

The resulting phenotypes are summarized in the table above.

Question

A. hw Incorrect B. h+ Correct C. +w Correct D. ++ Incorrect MA

2c86_87f2

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 W is affiliated with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes		Progeny Count
rusty, waxy	r	w	994
rusty	r	+	595
waxy	+	w	589
wildtype	+	+	1,022
TOTAL =			3,200

The resulting phenotypes are summarized in the table above.

Question

A. rw Correct B. r+ Incorrect C. +w Incorrect D. ++ Correct MA

78ef_96ab

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 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
nerdy, yucky	n	y	1,925
nerdy	n	+	129
yucky	+	y	123
wildtype	+	+	2,023
TOTAL =			4,200

The resulting phenotypes are summarized in the table above.

Question

A. ny Correct B. n+ Incorrect C. +y Incorrect D. ++ Correct MA

5139_330e

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 X is linked with the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes		Progeny Count
fuzzy, xanthic	f	x	690
fuzzy	f	+	376
xanthic	+	x	416
wildtype	+	+	718
TOTAL =			2,200

The resulting phenotypes are summarized in the table above.

Question

A. fx Correct B. f+ Incorrect C. +x Incorrect D. ++ Correct MA

4647_4eea

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 connected with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene 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
kidney, xanthic	k	x	103
kidney	k	+	475
xanthic	+	x	509
wildtype	+	+	113
TOTAL =			1,200

The resulting phenotypes are summarized in the table above.

Question

A. kx Incorrect B. k+ Correct C. +x Correct D. ++ Incorrect MA

6be3_020f

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 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	293
horsey	h	+	625
rusty	+	r	563
wildtype	+	+	319
TOTAL =			1,800

The resulting phenotypes are summarized in the table above.

Question

A. hr Incorrect B. h+ Correct C. +r Correct D. ++ Incorrect MA

10c3_b701

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 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.

Phenotype	Genotypes		Progeny Count
artsy, chummy	a	c	212
artsy	a	+	4,289
chummy	+	c	4,261
wildtype	+	+	238
TOTAL =			9,000

The resulting phenotypes are summarized in the table above.

Question

A. ac Incorrect B. a+ Correct C. +c Correct D. ++ Incorrect MA

2c22_a2ac

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 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
bumpy, prickly	b	p	988
bumpy	b	+	197
prickly	+	p	187
wildtype	+	+	1,028
TOTAL =			2,400

The resulting phenotypes are summarized in the table above.

Question

A. bp Correct B. b+ Incorrect C. +p Incorrect D. ++ Correct MA

37d6_c934

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 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
artsy, fuzzy	a	f	2,239
artsy	a	+	846
fuzzy	+	f	890
wildtype	+	+	2,225
TOTAL =			6,200

The resulting phenotypes are summarized in the table above.

Question

A. af Correct B. a+ Incorrect C. +f Incorrect D. ++ Correct MA

30e9_b280

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 connected with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.
Gene R is affiliated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes		Progeny Count
kidney, rusty	k	r	228
kidney	k	+	628
rusty	+	r	704
wildtype	+	+	240
TOTAL =			1,800

The resulting phenotypes are summarized in the table above.

Question

A. kr Incorrect B. k+ Correct C. +r Correct D. ++ Incorrect MA

a34d_05ad

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 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
rusty, xanthic	r	x	301
rusty	r	+	1,652
xanthic	+	x	1,708
wildtype	+	+	339
TOTAL =			4,000

The resulting phenotypes are summarized in the table above.

Question

A. rx Incorrect B. r+ Correct C. +x Correct D. ++ Incorrect MA

0dd6_529a

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 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
artsy, horsey	a	h	1,008
artsy	a	+	1,755
horsey	+	h	1,701
wildtype	+	+	936
TOTAL =			5,400

The resulting phenotypes are summarized in the table above.

Question

A. ah Incorrect B. a+ Correct C. +h Correct D. ++ Incorrect MA

cc00_8fdd

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 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
fuzzy, jerky	f	j	817
fuzzy	f	+	178
jerky	+	j	202
wildtype	+	+	803
TOTAL =			2,000

The resulting phenotypes are summarized in the table above.

Question

A. fj Correct B. f+ Incorrect C. +j Incorrect D. ++ Correct MA

50e2_06bc

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 N is correlated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.

Phenotype	Genotypes		Progeny Count
artsy, nerdy	a	n	2,808
artsy	a	+	424
nerdy	+	n	434
wildtype	+	+	2,934
TOTAL =			6,600

The resulting phenotypes are summarized in the table above.

Question

A. an Correct B. a+ Incorrect C. +n Incorrect D. ++ Correct MA

0d39_5b47

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 linked with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene K is connected with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.

Phenotype	Genotypes		Progeny Count
horsey, kidney	h	k	476
horsey	h	+	29
kidney	+	k	31
wildtype	+	+	464
TOTAL =			1,000

The resulting phenotypes are summarized in the table above.

Question

A. hk Correct B. h+ Incorrect C. +k Incorrect D. ++ Correct MA

122e_fc86

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 associated with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene 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
fuzzy, prickly	f	p	820
fuzzy	f	+	1,821
prickly	+	p	1,905
wildtype	+	+	854
TOTAL =			5,400

The resulting phenotypes are summarized in the table above.

Question

A. fp Incorrect B. f+ Correct C. +p Correct D. ++ Incorrect MA

cf5d_3349

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 related to the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene 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
prickly, yucky	p	y	947
prickly	p	+	2,714
yucky	+	y	2,836
wildtype	+	+	903
TOTAL =			7,400

The resulting phenotypes are summarized in the table above.

Question

A. py Incorrect B. p+ Correct C. +y Correct D. ++ Incorrect MA

1bf1_d6d2

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 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
prickly, rusty	p	r	573
prickly	p	+	1,137
rusty	+	r	1,107
wildtype	+	+	583
TOTAL =			3,400

The resulting phenotypes are summarized in the table above.

Question

A. pr Incorrect B. p+ Correct C. +r Correct D. ++ Incorrect MA

d0e6_7452

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 connected with the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene K is associated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.

Phenotype	Genotypes		Progeny Count
jerky, kidney	j	k	2,646
jerky	j	+	1,326
kidney	+	k	1,314
wildtype	+	+	2,714
TOTAL =			8,000

The resulting phenotypes are summarized in the table above.

Question

A. jk Correct B. j+ Incorrect C. +k Incorrect D. ++ Correct MA

cded_f2be

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 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
chummy, xanthic	c	x	297
chummy	c	+	762
xanthic	+	x	822
wildtype	+	+	319
TOTAL =			2,200

The resulting phenotypes are summarized in the table above.

Question

A. cx Incorrect B. c+ Correct C. +x Correct D. ++ Incorrect MA

5ee1_31ed

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 related to the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene P is analogous to the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes		Progeny Count
horsey, prickly	h	p	4,139
horsey	h	+	452
prickly	+	p	468
wildtype	+	+	4,141
TOTAL =			9,200

The resulting phenotypes are summarized in the table above.

Question

A. hp Correct B. h+ Incorrect C. +p Incorrect D. ++ Correct MA

ba67_cc32

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 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.

Phenotype	Genotypes		Progeny Count
chummy, eery	c	e	1,290
chummy	c	+	350
eery	+	e	354
wildtype	+	+	1,206
TOTAL =			3,200

The resulting phenotypes are summarized in the table above.

Question

A. ce Correct B. c+ Incorrect C. +e Incorrect D. ++ Correct MA

e451_bd8a

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

Phenotype	Genotypes		Progeny Count
mushy, waxy	m	w	823
mushy	m	+	239
waxy	+	w	245
wildtype	+	+	893
TOTAL =			2,200

The resulting phenotypes are summarized in the table above.

Question

A. mw Correct B. m+ Incorrect C. +w Incorrect D. ++ Correct MA

f799_7889

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 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
artsy, kidney	a	k	432
artsy	a	+	80
kidney	+	k	50
wildtype	+	+	438
TOTAL =			1,000

The resulting phenotypes are summarized in the table above.

Question

A. ak Correct B. a+ Incorrect C. +k Incorrect D. ++ Correct MA

fef9_2297

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 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.

Phenotype	Genotypes		Progeny Count
dewy, eery	d	e	793
dewy	d	+	46
eery	+	e	34
wildtype	+	+	727
TOTAL =			1,600

The resulting phenotypes are summarized in the table above.

Question

A. de Correct B. d+ Incorrect C. +e Incorrect D. ++ Correct MA

d9b5_ef7b

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 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
bumpy, waxy	b	w	405
bumpy	b	+	2,892
waxy	+	w	2,916
wildtype	+	+	387
TOTAL =			6,600

The resulting phenotypes are summarized in the table above.

Question

A. bw Incorrect B. b+ Correct C. +w Correct D. ++ Incorrect MA

9545_8fdd

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 associated with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene J is 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
fuzzy, jerky	f	j	1,762
fuzzy	f	+	2,923
jerky	+	j	2,905
wildtype	+	+	1,810
TOTAL =			9,400

The resulting phenotypes are summarized in the table above.

Question

A. fj Incorrect B. f+ Correct C. +j Correct D. ++ Incorrect MA

7973_e794

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 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
horsey, yucky	h	y	11
horsey	h	+	703
yucky	+	y	669
wildtype	+	+	17
TOTAL =			1,400

The resulting phenotypes are summarized in the table above.

Question

A. hy Incorrect B. h+ Correct C. +y Correct D. ++ Incorrect MA

9c50_793c

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 linked with the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene 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
jerky, tipsy	j	t	391
jerky	j	+	2,935
tipsy	+	t	2,873
wildtype	+	+	401
TOTAL =			6,600

The resulting phenotypes are summarized in the table above.

Question

A. jt Incorrect B. j+ Correct C. +t Correct D. ++ Incorrect MA

8d08_01de

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 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
eery, waxy	e	w	427
eery	e	+	963
waxy	+	w	969
wildtype	+	+	441
TOTAL =			2,800

The resulting phenotypes are summarized in the table above.

Question

A. ew Incorrect B. e+ Correct C. +w Correct D. ++ Incorrect MA

db88_01de

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 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
eery, waxy	e	w	651
eery	e	+	1,239
waxy	+	w	1,269
wildtype	+	+	641
TOTAL =			3,800

The resulting phenotypes are summarized in the table above.

Question

A. ew Incorrect B. e+ Correct C. +w Correct D. ++ Incorrect MA

fb16_971e

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 connected with the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.
Gene F is 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
eery, fuzzy	e	f	2,527
eery	e	+	52
fuzzy	+	f	52
wildtype	+	+	2,569
TOTAL =			5,200

The resulting phenotypes are summarized in the table above.

Question

A. ef Correct B. e+ Incorrect C. +f Incorrect D. ++ Correct MA

b4fe_fe65

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 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
horsey, xanthic	h	x	607
horsey	h	+	77
xanthic	+	x	91
wildtype	+	+	625
TOTAL =			1,400

The resulting phenotypes are summarized in the table above.

Question

A. hx Correct B. h+ Incorrect C. +x Incorrect D. ++ Correct MA

2198_05ad

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 linked with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.
Gene 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
rusty, xanthic	r	x	576
rusty	r	+	3,341
xanthic	+	x	3,289
wildtype	+	+	594
TOTAL =			7,800

The resulting phenotypes are summarized in the table above.

Question

A. rx Incorrect B. r+ Correct C. +x Correct D. ++ Incorrect MA

18f1_1223

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 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
artsy, prickly	a	p	3,738
artsy	a	+	462
prickly	+	p	462
wildtype	+	+	3,738
TOTAL =			8,400

The resulting phenotypes are summarized in the table above.

Question

A. ap Correct B. a+ Incorrect C. +p Incorrect D. ++ Correct MA

4e34_95fd

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

Phenotype	Genotypes		Progeny Count
kidney, nerdy	k	n	120
kidney	k	+	566
nerdy	+	n	582
wildtype	+	+	132
TOTAL =			1,400

The resulting phenotypes are summarized in the table above.

Question

A. kn Incorrect B. k+ Correct C. +n Correct D. ++ Incorrect MA

8645_c41d

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 related to the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.
Gene X is 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
waxy, xanthic	w	x	84
waxy	w	+	542
xanthic	+	x	514
wildtype	+	+	60
TOTAL =			1,200

The resulting phenotypes are summarized in the table above.

Question

A. wx Incorrect B. w+ Correct C. +x Correct D. ++ Incorrect MA

9fe1_eb4f

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 associated with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes		Progeny Count
chummy, yucky	c	y	200
chummy	c	+	2,166
yucky	+	y	2,202
wildtype	+	+	232
TOTAL =			4,800

The resulting phenotypes are summarized in the table above.

Question

A. cy Incorrect B. c+ Correct C. +y Correct D. ++ Incorrect MA

49db_95fd

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 N is related to the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.

Phenotype	Genotypes		Progeny Count
kidney, nerdy	k	n	762
kidney	k	+	3,831
nerdy	+	n	3,805
wildtype	+	+	802
TOTAL =			9,200

The resulting phenotypes are summarized in the table above.

Question

A. kn Incorrect B. k+ Correct C. +n Correct D. ++ Incorrect MA

b77a_aef0

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 B is related to the 'bumpy' phenotype. A fruit fly that is homozygous recessive for Gene B has a skin texture that is not smooth, but rough with small bumps all over.

Phenotype	Genotypes		Progeny Count
artsy, bumpy	a	b	977
artsy	a	+	154
bumpy	+	b	154
wildtype	+	+	915
TOTAL =			2,200

The resulting phenotypes are summarized in the table above.

Question

A. ab Correct B. a+ Incorrect C. +b Incorrect D. ++ Correct MA

3496_2572

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 N is related to the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.

Phenotype	Genotypes		Progeny Count
horsey, nerdy	h	n	1,651
horsey	h	+	3,230
nerdy	+	n	3,202
wildtype	+	+	1,517
TOTAL =			9,600

The resulting phenotypes are summarized in the table above.

Question

A. hn Incorrect B. h+ Correct C. +n Correct D. ++ Incorrect MA

88ca_6d24

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 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
bumpy, xanthic	b	x	102
bumpy	b	+	4,670
xanthic	+	x	4,738
wildtype	+	+	90
TOTAL =			9,600

The resulting phenotypes are summarized in the table above.

Question

A. bx Incorrect B. b+ Correct C. +x Correct D. ++ Incorrect MA

f478_4e6d

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 J is connected with the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.

Phenotype	Genotypes		Progeny Count
chummy, jerky	c	j	1,170
chummy	c	+	2,671
jerky	+	j	2,573
wildtype	+	+	1,186
TOTAL =			7,600

The resulting phenotypes are summarized in the table above.

Question

A. cj Incorrect B. c+ Correct C. +j Correct D. ++ Incorrect MA

d61e_7c3a

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 linked with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.
Gene 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	57
horsey	h	+	515
waxy	+	w	577
wildtype	+	+	51
TOTAL =			1,200

The resulting phenotypes are summarized in the table above.

Question

A. hw Incorrect B. h+ Correct C. +w Correct D. ++ Incorrect MA

6638_d170

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 affiliated with the 'jerky' phenotype. A fruit fly that is homozygous recessive for Gene J moves in rapid and sudden movements, displaying an unpredictable flight pattern.
Gene 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
jerky, xanthic	j	x	2,105
jerky	j	+	331
xanthic	+	x	341
wildtype	+	+	2,023
TOTAL =			4,800

The resulting phenotypes are summarized in the table above.

Question

A. jx Correct B. j+ Incorrect C. +x Incorrect D. ++ Correct MA

a200_529a

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 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
artsy, horsey	a	h	324
artsy	a	+	3,720
horsey	+	h	3,640
wildtype	+	+	316
TOTAL =			8,000

The resulting phenotypes are summarized in the table above.

Question

A. ah Incorrect B. a+ Correct C. +h Correct D. ++ Incorrect MA

e303_e071

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 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
dewy, rusty	d	r	1,020
dewy	d	+	237
rusty	+	r	257
wildtype	+	+	1,086
TOTAL =			2,600

The resulting phenotypes are summarized in the table above.

Question

A. dr Correct B. d+ Incorrect C. +r Incorrect D. ++ Correct MA

8cd0_c934

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 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
artsy, fuzzy	a	f	639
artsy	a	+	165
fuzzy	+	f	171
wildtype	+	+	625
TOTAL =			1,600

The resulting phenotypes are summarized in the table above.

Question

A. af Correct B. a+ Incorrect C. +f Incorrect D. ++ Correct MA

23b8_cf64

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 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
fuzzy, rusty	f	r	3,067
fuzzy	f	+	1,800
rusty	+	r	1,752
wildtype	+	+	2,981
TOTAL =			9,600

The resulting phenotypes are summarized in the table above.

Question

A. fr Correct B. f+ Incorrect C. +r Incorrect D. ++ Correct MA

1061_96ab

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 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
nerdy, yucky	n	y	3,405
nerdy	n	+	100
yucky	+	y	110
wildtype	+	+	3,385
TOTAL =			7,000

The resulting phenotypes are summarized in the table above.

Question

A. ny Correct B. n+ Incorrect C. +y Incorrect D. ++ Correct MA

4af7_96ab

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 related to the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.
Gene 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
nerdy, yucky	n	y	411
nerdy	n	+	1,277
yucky	+	y	1,273
wildtype	+	+	439
TOTAL =			3,400

The resulting phenotypes are summarized in the table above.

Question

A. ny Incorrect B. n+ Correct C. +y Correct D. ++ Incorrect MA

dc37_d6d2

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 R is affiliated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes		Progeny Count
prickly, rusty	p	r	574
prickly	p	+	1,859
rusty	+	r	1,789
wildtype	+	+	578
TOTAL =			4,800

The resulting phenotypes are summarized in the table above.

Question

A. pr Incorrect B. p+ Correct C. +r Correct D. ++ Incorrect MA

1dea_3fd5

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 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
mushy, xanthic	m	x	527
mushy	m	+	2,726
xanthic	+	x	2,818
wildtype	+	+	529
TOTAL =			6,600

The resulting phenotypes are summarized in the table above.

Question

A. mx Incorrect B. m+ Correct C. +x Correct D. ++ Incorrect MA

2ff6_0884

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 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
dewy, fuzzy	d	f	1,340
dewy	d	+	3,304
fuzzy	+	f	3,370
wildtype	+	+	1,386
TOTAL =			9,400

The resulting phenotypes are summarized in the table above.

Question

A. df Incorrect B. d+ Correct C. +f Correct D. ++ Incorrect MA

e220_330e

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 associated with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.
Gene 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
fuzzy, xanthic	f	x	1,078
fuzzy	f	+	2,112
xanthic	+	x	2,112
wildtype	+	+	1,098
TOTAL =			6,400

The resulting phenotypes are summarized in the table above.

Question

A. fx Incorrect B. f+ Correct C. +x Correct D. ++ Incorrect MA

9711_0f61

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 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	2,465
horsey	h	+	790
mushy	+	m	794
wildtype	+	+	2,551
TOTAL =			6,600

The resulting phenotypes are summarized in the table above.

Question

A. hm Correct B. h+ Incorrect C. +m Incorrect D. ++ Correct MA

0c3a_fad6

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 related to the 'dewy' phenotype. A fruit fly that is homozygous recessive for Gene D appears moist, with its body covered in tiny droplets of water.

Phenotype	Genotypes		Progeny Count
artsy, dewy	a	d	239
artsy	a	+	665
dewy	+	d	685
wildtype	+	+	211
TOTAL =			1,800

The resulting phenotypes are summarized in the table above.

Question

A. ad Incorrect B. a+ Correct C. +d Correct D. ++ Incorrect MA

7014_c568

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 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
bumpy, tipsy	b	t	162
bumpy	b	+	832
tipsy	+	t	848
wildtype	+	+	158
TOTAL =			2,000

The resulting phenotypes are summarized in the table above.

Question

A. bt Incorrect B. b+ Correct C. +t Correct D. ++ Incorrect MA

77bf_e6a6

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 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
kidney, tipsy	k	t	776
kidney	k	+	224
tipsy	+	t	216
wildtype	+	+	784
TOTAL =			2,000

The resulting phenotypes are summarized in the table above.

Question

A. kt Correct B. k+ Incorrect C. +t Incorrect D. ++ Correct MA

fe94_2572

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 N is associated with the 'nerdy' phenotype. A fruit fly that is homozygous recessive for Gene N has large, prominent eyes that stand out, much like thick-rimmed glasses.

Phenotype	Genotypes		Progeny Count
horsey, nerdy	h	n	475
horsey	h	+	1,557
nerdy	+	n	1,483
wildtype	+	+	485
TOTAL =			4,000

The resulting phenotypes are summarized in the table above.

Question

A. hn Incorrect B. h+ Correct C. +n Correct D. ++ Incorrect MA

e06e_c20a

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 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
fuzzy, mushy	f	m	188
fuzzy	f	+	590
mushy	+	m	610
wildtype	+	+	212
TOTAL =			1,600

The resulting phenotypes are summarized in the table above.

Question

A. fm Incorrect B. f+ Correct C. +m Correct D. ++ Incorrect MA

0219_ddab

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 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
artsy, xanthic	a	x	3,800
artsy	a	+	432
xanthic	+	x	408
wildtype	+	+	3,760
TOTAL =			8,400

The resulting phenotypes are summarized in the table above.

Question

A. ax Correct B. a+ Incorrect C. +x Incorrect D. ++ Correct MA

4c1b_020f

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 R is linked with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes		Progeny Count
horsey, rusty	h	r	921
horsey	h	+	1,778
rusty	+	r	1,732
wildtype	+	+	969
TOTAL =			5,400

The resulting phenotypes are summarized in the table above.

Question

A. hr Incorrect B. h+ Correct C. +r Correct D. ++ Incorrect MA

385b_01de

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 W is affiliated with the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.

Phenotype	Genotypes		Progeny Count
eery, waxy	e	w	1,968
eery	e	+	719
waxy	+	w	739
wildtype	+	+	1,974
TOTAL =			5,400

The resulting phenotypes are summarized in the table above.

Question

A. ew Correct B. e+ Incorrect C. +w Incorrect D. ++ Correct MA

d5e1_0ed4

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 R is affiliated with the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.

Phenotype	Genotypes		Progeny Count
chummy, rusty	c	r	1,039
chummy	c	+	1,941
rusty	+	r	1,959
wildtype	+	+	1,061
TOTAL =			6,000

The resulting phenotypes are summarized in the table above.

Question

A. cr Incorrect B. c+ Correct C. +r Correct D. ++ Incorrect MA

94cc_8162

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 P is related to the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes		Progeny Count
kidney, prickly	k	p	2,043
kidney	k	+	1,357
prickly	+	p	1,363
wildtype	+	+	2,037
TOTAL =			6,800

The resulting phenotypes are summarized in the table above.

Question

A. kp Correct B. k+ Incorrect C. +p Incorrect D. ++ Correct MA

a9ad_c806

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 K is related to the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.

Phenotype	Genotypes		Progeny Count
bumpy, kidney	b	k	3,508
bumpy	b	+	964
kidney	+	k	1,016
wildtype	+	+	3,512
TOTAL =			9,000

The resulting phenotypes are summarized in the table above.

Question

A. bk Correct B. b+ Incorrect C. +k Incorrect D. ++ Correct MA

6e31_c41d

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	493
waxy	w	+	209
xanthic	+	x	225
wildtype	+	+	473
TOTAL =			1,400

The resulting phenotypes are summarized in the table above.

Question

A. wx Correct B. w+ Incorrect C. +x Incorrect D. ++ Correct MA

8909_c20a

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 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
fuzzy, mushy	f	m	1,665
fuzzy	f	+	2,528
mushy	+	m	2,512
wildtype	+	+	1,695
TOTAL =			8,400

The resulting phenotypes are summarized in the table above.

Question

A. fm Incorrect B. f+ Correct C. +m Correct D. ++ Incorrect MA

718c_1c1b

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 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
dewy, xanthic	d	x	1,387
dewy	d	+	508
xanthic	+	x	518
wildtype	+	+	1,387
TOTAL =			3,800

The resulting phenotypes are summarized in the table above.

Question

A. dx Correct B. d+ Incorrect C. +x Incorrect D. ++ Correct MA

09ba_078e

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 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	423
bumpy	b	+	847
chummy	+	c	895
wildtype	+	+	435
TOTAL =			2,600

The resulting phenotypes are summarized in the table above.

Question

A. bc Incorrect B. b+ Correct C. +c Correct D. ++ Incorrect MA

3014_d6d2

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 affiliated with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene R is 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	696
prickly	p	+	2,928
rusty	+	r	2,904
wildtype	+	+	672
TOTAL =			7,200

The resulting phenotypes are summarized in the table above.

Question

A. pr Incorrect B. p+ Correct C. +r Correct D. ++ Incorrect MA

4923_330e

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 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
fuzzy, xanthic	f	x	511
fuzzy	f	+	1,668
xanthic	+	x	1,720
wildtype	+	+	501
TOTAL =			4,400

The resulting phenotypes are summarized in the table above.

Question

A. fx Incorrect B. f+ Correct C. +x Correct D. ++ Incorrect MA

54d3_c806

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 K is correlated with the 'kidney' phenotype. A fruit fly that is homozygous recessive for Gene K has a body shape that is curved, similar to a kidney bean.

Phenotype	Genotypes		Progeny Count
bumpy, kidney	b	k	804
bumpy	b	+	90
kidney	+	k	108
wildtype	+	+	798
TOTAL =			1,800

The resulting phenotypes are summarized in the table above.

Question

A. bk Correct B. b+ Incorrect C. +k Incorrect D. ++ Correct MA

2cf9_1c5c

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 correlated with the 'yucky' phenotype. A fruit fly that is homozygous recessive for Gene Y gives off an unpleasant odor and has a generally unappealing look.

Phenotype	Genotypes		Progeny Count
rusty, yucky	r	y	1,455
rusty	r	+	2,591
yucky	+	y	2,657
wildtype	+	+	1,497
TOTAL =			8,200

The resulting phenotypes are summarized in the table above.

Question

A. ry Incorrect B. r+ Correct C. +y Correct D. ++ Incorrect MA

524d_2ab8

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 related to the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.
Gene 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
prickly, xanthic	p	x	1,281
prickly	p	+	31
xanthic	+	x	21
wildtype	+	+	1,267
TOTAL =			2,600

The resulting phenotypes are summarized in the table above.

Question

A. px Correct B. p+ Incorrect C. +x Incorrect D. ++ Correct MA

8f5f_05ad

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 analogous to the 'rusty' phenotype. A fruit fly that is homozygous recessive for Gene R has a reddish-brown color, much like rusted iron metal.
Gene 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
rusty, xanthic	r	x	1,175
rusty	r	+	3,340
xanthic	+	x	3,468
wildtype	+	+	1,217
TOTAL =			9,200

The resulting phenotypes are summarized in the table above.

Question

A. rx Incorrect B. r+ Correct C. +x Correct D. ++ Incorrect MA

061f_0ed4

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 linked with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.
Gene 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	2,379
chummy	c	+	675
rusty	+	r	689
wildtype	+	+	2,457
TOTAL =			6,200

The resulting phenotypes are summarized in the table above.

Question

A. cr Correct B. c+ Incorrect C. +r Incorrect D. ++ Correct MA

4804_0f61

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 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	1,075
horsey	h	+	1,712
mushy	+	m	1,704
wildtype	+	+	1,109
TOTAL =			5,600

The resulting phenotypes are summarized in the table above.

Question

A. hm Incorrect B. h+ Correct C. +m Correct D. ++ Incorrect MA

3ed7_3fd5

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 X is related to the 'xanthic' phenotype. A fruit fly that is homozygous recessive for Gene X has a fluorescent bright yellow coloring.

Phenotype	Genotypes		Progeny Count
mushy, xanthic	m	x	177
mushy	m	+	2,679
xanthic	+	x	2,773
wildtype	+	+	171
TOTAL =			5,800

The resulting phenotypes are summarized in the table above.

Question

A. mx Incorrect B. m+ Correct C. +x Correct D. ++ Incorrect MA

5f75_ddec

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 related to the 'waxy' phenotype. A fruit fly that is homozygous recessive for Gene W has a thick protective layer that is water resistant and opague.
Gene 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
waxy, yucky	w	y	489
waxy	w	+	314
yucky	+	y	310
wildtype	+	+	487
TOTAL =			1,600

The resulting phenotypes are summarized in the table above.

Question

A. wy Correct B. w+ Incorrect C. +y Incorrect D. ++ Correct MA

785e_d1f7

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 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
bumpy, jerky	b	j	2,884
bumpy	b	+	117
jerky	+	j	123
wildtype	+	+	2,876
TOTAL =			6,000

The resulting phenotypes are summarized in the table above.

Question

A. bj Correct B. b+ Incorrect C. +j Incorrect D. ++ Correct MA

59d3_1223

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 P is connected with the 'prickly' phenotype. A fruit fly that is homozygous recessive for Gene P is covered with sharp bristles, giving it a spiky texture.

Phenotype	Genotypes		Progeny Count
artsy, prickly	a	p	245
artsy	a	+	2,036
prickly	+	p	2,058
wildtype	+	+	261
TOTAL =			4,600

The resulting phenotypes are summarized in the table above.

Question

A. ap Incorrect B. a+ Correct C. +p Correct D. ++ Incorrect