4b65_55c1

Dihybrid Cross		Female ♀
Dihybrid Cross		GR	Gr	gR	gr
Male ♂	GR	GGRR	GGRr	GgRR	GgRr
	Gr	GGRr	GGrr	GgRr	Ggrr
	gR	GgRR	GgRr	ggRR	ggRr
	gr	GgRr	Ggrr	ggRr	ggrr

Test Cross		Female ♀
Test Cross		gr
Male ♂	GR	GgRr
	Gr	Ggrr
	gR	ggRr
	gr	ggrr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to three to one (9:3:3:1).

What type of gene interaction is being shown?

A. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Correct B. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect D. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect MC

e430_f508

Dihybrid Cross		Female ♀
Dihybrid Cross		RT	Rt	rT	rt
Male ♂	RT	RRTT	RRTt	RrTT	RrTt
	Rt	RRTt	RRtt	RrTt	Rrtt
	rT	RrTT	RrTt	rrTT	rrTt
	rt	RrTt	Rrtt	rrTt	rrtt

Test Cross		Female ♀
Test Cross		rt
Male ♂	RT	RrTt
	Rt	Rrtt
	rT	rrTt
	rt	rrtt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to four (9:3:4).

What type of gene interaction is being shown?

A. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect B. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect C. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Correct D. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect MC

d09c_7c40

Dihybrid Cross		Female ♀
Dihybrid Cross		AG	Ag	aG	ag
Male ♂	AG	AAGG	AAGg	AaGG	AaGg
	Ag	AAGg	AAgg	AaGg	Aagg
	aG	AaGG	AaGg	aaGG	aaGg
	ag	AaGg	Aagg	aaGg	aagg

Test Cross		Female ♀
Test Cross		ag
Male ♂	AG	AaGg
	Ag	Aagg
	aG	aaGg
	ag	aagg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were twelve to three to one (12:3:1).

What type of gene interaction is being shown?

A. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect B. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect C. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Correct MC

6c03_89e6

Dihybrid Cross		Female ♀
Dihybrid Cross		DE	De	dE	de
Male ♂	DE	DDEE	DDEe	DdEE	DdEe
	De	DDEe	DDee	DdEe	Ddee
	dE	DdEE	DdEe	ddEE	ddEe
	de	DdEe	Ddee	ddEe	ddee

Test Cross		Female ♀
Test Cross		de
Male ♂	DE	DdEe
	De	Ddee
	dE	ddEe
	de	ddee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to seven (9:7).

What type of gene interaction is being shown?

A. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect B. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Correct C. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect MC

af45_625a

Dihybrid Cross		Female ♀
Dihybrid Cross		GR	Gr	gR	gr
Male ♂	GR	GGRR	GGRr	GgRR	GgRr
	Gr	GGRr	GGrr	GgRr	Ggrr
	gR	GgRR	GgRr	ggRR	ggRr
	gr	GgRr	Ggrr	ggRr	ggrr

Test Cross		Female ♀
Test Cross		gr
Male ♂	GR	GgRr
	Gr	Ggrr
	gR	ggRr
	gr	ggrr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to six to one (9:6:1).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect B. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Correct C. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect MC

2570_b756

Dihybrid Cross		Female ♀
Dihybrid Cross		DE	De	dE	de
Male ♂	DE	DDEE	DDEe	DdEE	DdEe
	De	DDEe	DDee	DdEe	Ddee
	dE	DdEE	DdEe	ddEE	ddEe
	de	DdEe	Ddee	ddEe	ddee

Test Cross		Female ♀
Test Cross		de
Male ♂	DE	DdEe
	De	Ddee
	dE	ddEe
	de	ddee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were fifteen to one (15:1).

What type of gene interaction is being shown?

A. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect B. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect C. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Correct D. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect MC

c5e9_04ee

Dihybrid Cross		Female ♀
Dihybrid Cross		AG	Ag	aG	ag
Male ♂	AG	AAGG	AAGg	AaGG	AaGg
	Ag	AAGg	AAgg	AaGg	Aagg
	aG	AaGG	AaGg	aaGG	aaGg
	ag	AaGg	Aagg	aaGg	aagg

Test Cross		Female ♀
Test Cross		ag
Male ♂	AG	AaGg
	Ag	Aagg
	aG	aaGg
	ag	aagg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were thirteen to three (13:3).

What type of gene interaction is being shown?

A. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect B. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect C. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect D. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Correct MC

23b9_8a0d

Dihybrid Cross		Female ♀
Dihybrid Cross		EG	Eg	eG	eg
Male ♂	EG	EEGG	EEGg	EeGG	EeGg
	Eg	EEGg	EEgg	EeGg	Eegg
	eG	EeGG	EeGg	eeGG	eeGg
	eg	EeGg	Eegg	eeGg	eegg

Test Cross		Female ♀
Test Cross		eg
Male ♂	EG	EeGg
	Eg	Eegg
	eG	eeGg
	eg	eegg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to three to one (9:3:3:1).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect B. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect C. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect D. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Correct MC

2f7d_3ea1

Dihybrid Cross		Female ♀
Dihybrid Cross		AT	At	aT	at
Male ♂	AT	AATT	AATt	AaTT	AaTt
	At	AATt	AAtt	AaTt	Aatt
	aT	AaTT	AaTt	aaTT	aaTt
	at	AaTt	Aatt	aaTt	aatt

Test Cross		Female ♀
Test Cross		at
Male ♂	AT	AaTt
	At	Aatt
	aT	aaTt
	at	aatt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to four (9:3:4).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect B. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect C. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Correct D. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect MC

270f_404d

Dihybrid Cross		Female ♀
Dihybrid Cross		AE	Ae	aE	ae
Male ♂	AE	AAEE	AAEe	AaEE	AaEe
	Ae	AAEe	AAee	AaEe	Aaee
	aE	AaEE	AaEe	aaEE	aaEe
	ae	AaEe	Aaee	aaEe	aaee

Test Cross		Female ♀
Test Cross		ae
Male ♂	AE	AaEe
	Ae	Aaee
	aE	aaEe
	ae	aaee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were twelve to three to one (12:3:1).

What type of gene interaction is being shown?

A. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect B. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Correct C. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect D. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect MC

ac65_5365

Dihybrid Cross		Female ♀
Dihybrid Cross		DE	De	dE	de
Male ♂	DE	DDEE	DDEe	DdEE	DdEe
	De	DDEe	DDee	DdEe	Ddee
	dE	DdEE	DdEe	ddEE	ddEe
	de	DdEe	Ddee	ddEe	ddee

Test Cross		Female ♀
Test Cross		de
Male ♂	DE	DdEe
	De	Ddee
	dE	ddEe
	de	ddee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to seven (9:7).

What type of gene interaction is being shown?

A. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect B. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Correct C. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect D. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect MC

0756_e2e1

Dihybrid Cross		Female ♀
Dihybrid Cross		DT	Dt	dT	dt
Male ♂	DT	DDTT	DDTt	DdTT	DdTt
	Dt	DDTt	DDtt	DdTt	Ddtt
	dT	DdTT	DdTt	ddTT	ddTt
	dt	DdTt	Ddtt	ddTt	ddtt

Test Cross		Female ♀
Test Cross		dt
Male ♂	DT	DdTt
	Dt	Ddtt
	dT	ddTt
	dt	ddtt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to six to one (9:6:1).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect B. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Correct C. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect D. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect MC

deaf_d714

Dihybrid Cross		Female ♀
Dihybrid Cross		DE	De	dE	de
Male ♂	DE	DDEE	DDEe	DdEE	DdEe
	De	DDEe	DDee	DdEe	Ddee
	dE	DdEE	DdEe	ddEE	ddEe
	de	DdEe	Ddee	ddEe	ddee

Test Cross		Female ♀
Test Cross		de
Male ♂	DE	DdEe
	De	Ddee
	dE	ddEe
	de	ddee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were fifteen to one (15:1).

What type of gene interaction is being shown?

A. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect B. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect C. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Correct MC

5a29_9ed9

Dihybrid Cross		Female ♀
Dihybrid Cross		RT	Rt	rT	rt
Male ♂	RT	RRTT	RRTt	RrTT	RrTt
	Rt	RRTt	RRtt	RrTt	Rrtt
	rT	RrTT	RrTt	rrTT	rrTt
	rt	RrTt	Rrtt	rrTt	rrtt

Test Cross		Female ♀
Test Cross		rt
Male ♂	RT	RrTt
	Rt	Rrtt
	rT	rrTt
	rt	rrtt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were thirteen to three (13:3).

What type of gene interaction is being shown?

A. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect B. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect C. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Correct D. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect MC

0d9b_06a9

Dihybrid Cross		Female ♀
Dihybrid Cross		GT	Gt	gT	gt
Male ♂	GT	GGTT	GGTt	GgTT	GgTt
	Gt	GGTt	GGtt	GgTt	Ggtt
	gT	GgTT	GgTt	ggTT	ggTt
	gt	GgTt	Ggtt	ggTt	ggtt

Test Cross		Female ♀
Test Cross		gt
Male ♂	GT	GgTt
	Gt	Ggtt
	gT	ggTt
	gt	ggtt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to three to one (9:3:3:1).

What type of gene interaction is being shown?

A. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect B. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect C. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Correct D. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect MC

7a4d_e91d

Dihybrid Cross		Female ♀
Dihybrid Cross		GT	Gt	gT	gt
Male ♂	GT	GGTT	GGTt	GgTT	GgTt
	Gt	GGTt	GGtt	GgTt	Ggtt
	gT	GgTT	GgTt	ggTT	ggTt
	gt	GgTt	Ggtt	ggTt	ggtt

Test Cross		Female ♀
Test Cross		gt
Male ♂	GT	GgTt
	Gt	Ggtt
	gT	ggTt
	gt	ggtt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to four (9:3:4).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect B. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect C. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect D. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Correct MC

54da_8f60

Dihybrid Cross		Female ♀
Dihybrid Cross		DE	De	dE	de
Male ♂	DE	DDEE	DDEe	DdEE	DdEe
	De	DDEe	DDee	DdEe	Ddee
	dE	DdEE	DdEe	ddEE	ddEe
	de	DdEe	Ddee	ddEe	ddee

Test Cross		Female ♀
Test Cross		de
Male ♂	DE	DdEe
	De	Ddee
	dE	ddEe
	de	ddee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were twelve to three to one (12:3:1).

What type of gene interaction is being shown?

A. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Correct B. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect C. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect D. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect MC

4534_83c4

Dihybrid Cross		Female ♀
Dihybrid Cross		AT	At	aT	at
Male ♂	AT	AATT	AATt	AaTT	AaTt
	At	AATt	AAtt	AaTt	Aatt
	aT	AaTT	AaTt	aaTT	aaTt
	at	AaTt	Aatt	aaTt	aatt

Test Cross		Female ♀
Test Cross		at
Male ♂	AT	AaTt
	At	Aatt
	aT	aaTt
	at	aatt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to seven (9:7).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Correct B. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect C. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect D. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect MC

8abd_e2e1

Dihybrid Cross		Female ♀
Dihybrid Cross		AR	Ar	aR	ar
Male ♂	AR	AARR	AARr	AaRR	AaRr
	Ar	AARr	AArr	AaRr	Aarr
	aR	AaRR	AaRr	aaRR	aaRr
	ar	AaRr	Aarr	aaRr	aarr

Test Cross		Female ♀
Test Cross		ar
Male ♂	AR	AaRr
	Ar	Aarr
	aR	aaRr
	ar	aarr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to six to one (9:6:1).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect B. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Correct C. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect D. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect MC

e3b6_9625

Dihybrid Cross		Female ♀
Dihybrid Cross		GR	Gr	gR	gr
Male ♂	GR	GGRR	GGRr	GgRR	GgRr
	Gr	GGRr	GGrr	GgRr	Ggrr
	gR	GgRR	GgRr	ggRR	ggRr
	gr	GgRr	Ggrr	ggRr	ggrr

Test Cross		Female ♀
Test Cross		gr
Male ♂	GR	GgRr
	Gr	Ggrr
	gR	ggRr
	gr	ggrr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were fifteen to one (15:1).

What type of gene interaction is being shown?

A. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect B. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect C. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Correct MC

c292_0b7e

Dihybrid Cross		Female ♀
Dihybrid Cross		DT	Dt	dT	dt
Male ♂	DT	DDTT	DDTt	DdTT	DdTt
	Dt	DDTt	DDtt	DdTt	Ddtt
	dT	DdTT	DdTt	ddTT	ddTt
	dt	DdTt	Ddtt	ddTt	ddtt

Test Cross		Female ♀
Test Cross		dt
Male ♂	DT	DdTt
	Dt	Ddtt
	dT	ddTt
	dt	ddtt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were thirteen to three (13:3).

What type of gene interaction is being shown?

A. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Correct B. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect D. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect MC

88d8_2bca

Dihybrid Cross		Female ♀
Dihybrid Cross		AE	Ae	aE	ae
Male ♂	AE	AAEE	AAEe	AaEE	AaEe
	Ae	AAEe	AAee	AaEe	Aaee
	aE	AaEE	AaEe	aaEE	aaEe
	ae	AaEe	Aaee	aaEe	aaee

Test Cross		Female ♀
Test Cross		ae
Male ♂	AE	AaEe
	Ae	Aaee
	aE	aaEe
	ae	aaee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to three to one (9:3:3:1).

What type of gene interaction is being shown?

A. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect B. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Correct C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect MC

ef17_5682

Dihybrid Cross		Female ♀
Dihybrid Cross		DE	De	dE	de
Male ♂	DE	DDEE	DDEe	DdEE	DdEe
	De	DDEe	DDee	DdEe	Ddee
	dE	DdEE	DdEe	ddEE	ddEe
	de	DdEe	Ddee	ddEe	ddee

Test Cross		Female ♀
Test Cross		de
Male ♂	DE	DdEe
	De	Ddee
	dE	ddEe
	de	ddee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to four (9:3:4).

What type of gene interaction is being shown?

A. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect B. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect C. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect D. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Correct MC

9460_1c3f

Dihybrid Cross		Female ♀
Dihybrid Cross		ER	Er	eR	er
Male ♂	ER	EERR	EERr	EeRR	EeRr
	Er	EERr	EErr	EeRr	Eerr
	eR	EeRR	EeRr	eeRR	eeRr
	er	EeRr	Eerr	eeRr	eerr

Test Cross		Female ♀
Test Cross		er
Male ♂	ER	EeRr
	Er	Eerr
	eR	eeRr
	er	eerr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were twelve to three to one (12:3:1).

What type of gene interaction is being shown?

A. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect B. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Correct C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect D. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect MC

171e_9d31

Dihybrid Cross		Female ♀
Dihybrid Cross		GR	Gr	gR	gr
Male ♂	GR	GGRR	GGRr	GgRR	GgRr
	Gr	GGRr	GGrr	GgRr	Ggrr
	gR	GgRR	GgRr	ggRR	ggRr
	gr	GgRr	Ggrr	ggRr	ggrr

Test Cross		Female ♀
Test Cross		gr
Male ♂	GR	GgRr
	Gr	Ggrr
	gR	ggRr
	gr	ggrr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to seven (9:7).

What type of gene interaction is being shown?

A. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect B. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Correct C. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect MC

1364_40d2

Dihybrid Cross		Female ♀
Dihybrid Cross		ER	Er	eR	er
Male ♂	ER	EERR	EERr	EeRR	EeRr
	Er	EERr	EErr	EeRr	Eerr
	eR	EeRR	EeRr	eeRR	eeRr
	er	EeRr	Eerr	eeRr	eerr

Test Cross		Female ♀
Test Cross		er
Male ♂	ER	EeRr
	Er	Eerr
	eR	eeRr
	er	eerr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to six to one (9:6:1).

What type of gene interaction is being shown?

A. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Correct B. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect C. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect D. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect MC

81ce_d3b0

Dihybrid Cross		Female ♀
Dihybrid Cross		AD	Ad	aD	ad
Male ♂	AD	AADD	AADd	AaDD	AaDd
	Ad	AADd	AAdd	AaDd	Aadd
	aD	AaDD	AaDd	aaDD	aaDd
	ad	AaDd	Aadd	aaDd	aadd

Test Cross		Female ♀
Test Cross		ad
Male ♂	AD	AaDd
	Ad	Aadd
	aD	aaDd
	ad	aadd

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were fifteen to one (15:1).

What type of gene interaction is being shown?

A. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect B. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Correct MC

39f7_af84

Dihybrid Cross		Female ♀
Dihybrid Cross		RT	Rt	rT	rt
Male ♂	RT	RRTT	RRTt	RrTT	RrTt
	Rt	RRTt	RRtt	RrTt	Rrtt
	rT	RrTT	RrTt	rrTT	rrTt
	rt	RrTt	Rrtt	rrTt	rrtt

Test Cross		Female ♀
Test Cross		rt
Male ♂	RT	RrTt
	Rt	Rrtt
	rT	rrTt
	rt	rrtt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were thirteen to three (13:3).

What type of gene interaction is being shown?

A. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Correct B. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect C. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect D. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect MC

88d8_2a03

Dihybrid Cross		Female ♀
Dihybrid Cross		AE	Ae	aE	ae
Male ♂	AE	AAEE	AAEe	AaEE	AaEe
	Ae	AAEe	AAee	AaEe	Aaee
	aE	AaEE	AaEe	aaEE	aaEe
	ae	AaEe	Aaee	aaEe	aaee

Test Cross		Female ♀
Test Cross		ae
Male ♂	AE	AaEe
	Ae	Aaee
	aE	aaEe
	ae	aaee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to three to one (9:3:3:1).

What type of gene interaction is being shown?

A. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Correct B. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect MC

4aa6_27c1

Dihybrid Cross		Female ♀
Dihybrid Cross		DE	De	dE	de
Male ♂	DE	DDEE	DDEe	DdEE	DdEe
	De	DDEe	DDee	DdEe	Ddee
	dE	DdEE	DdEe	ddEE	ddEe
	de	DdEe	Ddee	ddEe	ddee

Test Cross		Female ♀
Test Cross		de
Male ♂	DE	DdEe
	De	Ddee
	dE	ddEe
	de	ddee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to four (9:3:4).

What type of gene interaction is being shown?

A. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Correct B. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect C. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect D. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect MC

2d59_0f7a

Dihybrid Cross		Female ♀
Dihybrid Cross		AE	Ae	aE	ae
Male ♂	AE	AAEE	AAEe	AaEE	AaEe
	Ae	AAEe	AAee	AaEe	Aaee
	aE	AaEE	AaEe	aaEE	aaEe
	ae	AaEe	Aaee	aaEe	aaee

Test Cross		Female ♀
Test Cross		ae
Male ♂	AE	AaEe
	Ae	Aaee
	aE	aaEe
	ae	aaee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were twelve to three to one (12:3:1).

What type of gene interaction is being shown?

A. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect B. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect C. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Correct MC

6da3_4212

Dihybrid Cross		Female ♀
Dihybrid Cross		AG	Ag	aG	ag
Male ♂	AG	AAGG	AAGg	AaGG	AaGg
	Ag	AAGg	AAgg	AaGg	Aagg
	aG	AaGG	AaGg	aaGG	aaGg
	ag	AaGg	Aagg	aaGg	aagg

Test Cross		Female ♀
Test Cross		ag
Male ♂	AG	AaGg
	Ag	Aagg
	aG	aaGg
	ag	aagg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to seven (9:7).

What type of gene interaction is being shown?

A. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect B. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect C. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect D. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Correct MC

d457_c756

Dihybrid Cross		Female ♀
Dihybrid Cross		EG	Eg	eG	eg
Male ♂	EG	EEGG	EEGg	EeGG	EeGg
	Eg	EEGg	EEgg	EeGg	Eegg
	eG	EeGG	EeGg	eeGG	eeGg
	eg	EeGg	Eegg	eeGg	eegg

Test Cross		Female ♀
Test Cross		eg
Male ♂	EG	EeGg
	Eg	Eegg
	eG	eeGg
	eg	eegg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to six to one (9:6:1).

What type of gene interaction is being shown?

A. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect B. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Correct D. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect MC

2069_aacf

Dihybrid Cross		Female ♀
Dihybrid Cross		DG	Dg	dG	dg
Male ♂	DG	DDGG	DDGg	DdGG	DdGg
	Dg	DDGg	DDgg	DdGg	Ddgg
	dG	DdGG	DdGg	ddGG	ddGg
	dg	DdGg	Ddgg	ddGg	ddgg

Test Cross		Female ♀
Test Cross		dg
Male ♂	DG	DdGg
	Dg	Ddgg
	dG	ddGg
	dg	ddgg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were fifteen to one (15:1).

What type of gene interaction is being shown?

A. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Correct B. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect C. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect D. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect MC

cf74_5bdd

Dihybrid Cross		Female ♀
Dihybrid Cross		AE	Ae	aE	ae
Male ♂	AE	AAEE	AAEe	AaEE	AaEe
	Ae	AAEe	AAee	AaEe	Aaee
	aE	AaEE	AaEe	aaEE	aaEe
	ae	AaEe	Aaee	aaEe	aaee

Test Cross		Female ♀
Test Cross		ae
Male ♂	AE	AaEe
	Ae	Aaee
	aE	aaEe
	ae	aaee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were thirteen to three (13:3).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect B. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect C. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Correct D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect MC

3ee3_739c

Dihybrid Cross		Female ♀
Dihybrid Cross		EG	Eg	eG	eg
Male ♂	EG	EEGG	EEGg	EeGG	EeGg
	Eg	EEGg	EEgg	EeGg	Eegg
	eG	EeGG	EeGg	eeGG	eeGg
	eg	EeGg	Eegg	eeGg	eegg

Test Cross		Female ♀
Test Cross		eg
Male ♂	EG	EeGg
	Eg	Eegg
	eG	eeGg
	eg	eegg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to three to one (9:3:3:1).

What type of gene interaction is being shown?

A. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Correct B. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect C. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect MC

b302_d8b3

Dihybrid Cross		Female ♀
Dihybrid Cross		ER	Er	eR	er
Male ♂	ER	EERR	EERr	EeRR	EeRr
	Er	EERr	EErr	EeRr	Eerr
	eR	EeRR	EeRr	eeRR	eeRr
	er	EeRr	Eerr	eeRr	eerr

Test Cross		Female ♀
Test Cross		er
Male ♂	ER	EeRr
	Er	Eerr
	eR	eeRr
	er	eerr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to four (9:3:4).

What type of gene interaction is being shown?

A. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect B. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Correct C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect MC

4915_410a

Dihybrid Cross		Female ♀
Dihybrid Cross		DE	De	dE	de
Male ♂	DE	DDEE	DDEe	DdEE	DdEe
	De	DDEe	DDee	DdEe	Ddee
	dE	DdEE	DdEe	ddEE	ddEe
	de	DdEe	Ddee	ddEe	ddee

Test Cross		Female ♀
Test Cross		de
Male ♂	DE	DdEe
	De	Ddee
	dE	ddEe
	de	ddee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were twelve to three to one (12:3:1).

What type of gene interaction is being shown?

A. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect B. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect C. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Correct D. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect MC

0fe8_de18

Dihybrid Cross		Female ♀
Dihybrid Cross		AT	At	aT	at
Male ♂	AT	AATT	AATt	AaTT	AaTt
	At	AATt	AAtt	AaTt	Aatt
	aT	AaTT	AaTt	aaTT	aaTt
	at	AaTt	Aatt	aaTt	aatt

Test Cross		Female ♀
Test Cross		at
Male ♂	AT	AaTt
	At	Aatt
	aT	aaTt
	at	aatt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to seven (9:7).

What type of gene interaction is being shown?

A. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect B. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect C. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Correct D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect MC

ae40_09d0

Dihybrid Cross		Female ♀
Dihybrid Cross		DG	Dg	dG	dg
Male ♂	DG	DDGG	DDGg	DdGG	DdGg
	Dg	DDGg	DDgg	DdGg	Ddgg
	dG	DdGG	DdGg	ddGG	ddGg
	dg	DdGg	Ddgg	ddGg	ddgg

Test Cross		Female ♀
Test Cross		dg
Male ♂	DG	DdGg
	Dg	Ddgg
	dG	ddGg
	dg	ddgg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to six to one (9:6:1).

What type of gene interaction is being shown?

A. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect B. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Correct C. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect D. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect MC

5c22_27d5

Dihybrid Cross		Female ♀
Dihybrid Cross		EG	Eg	eG	eg
Male ♂	EG	EEGG	EEGg	EeGG	EeGg
	Eg	EEGg	EEgg	EeGg	Eegg
	eG	EeGG	EeGg	eeGG	eeGg
	eg	EeGg	Eegg	eeGg	eegg

Test Cross		Female ♀
Test Cross		eg
Male ♂	EG	EeGg
	Eg	Eegg
	eG	eeGg
	eg	eegg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were fifteen to one (15:1).

What type of gene interaction is being shown?

A. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Correct B. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect C. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect D. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect MC

004d_fcc6

Dihybrid Cross		Female ♀
Dihybrid Cross		DT	Dt	dT	dt
Male ♂	DT	DDTT	DDTt	DdTT	DdTt
	Dt	DDTt	DDtt	DdTt	Ddtt
	dT	DdTT	DdTt	ddTT	ddTt
	dt	DdTt	Ddtt	ddTt	ddtt

Test Cross		Female ♀
Test Cross		dt
Male ♂	DT	DdTt
	Dt	Ddtt
	dT	ddTt
	dt	ddtt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were thirteen to three (13:3).

What type of gene interaction is being shown?

A. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect B. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Correct C. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect D. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect MC

4b8f_ad39

Dihybrid Cross		Female ♀
Dihybrid Cross		AG	Ag	aG	ag
Male ♂	AG	AAGG	AAGg	AaGG	AaGg
	Ag	AAGg	AAgg	AaGg	Aagg
	aG	AaGG	AaGg	aaGG	aaGg
	ag	AaGg	Aagg	aaGg	aagg

Test Cross		Female ♀
Test Cross		ag
Male ♂	AG	AaGg
	Ag	Aagg
	aG	aaGg
	ag	aagg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to three to one (9:3:3:1).

What type of gene interaction is being shown?

A. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect B. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Correct C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect D. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect MC

cc51_12ef

Dihybrid Cross		Female ♀
Dihybrid Cross		DR	Dr	dR	dr
Male ♂	DR	DDRR	DDRr	DdRR	DdRr
	Dr	DDRr	DDrr	DdRr	Ddrr
	dR	DdRR	DdRr	ddRR	ddRr
	dr	DdRr	Ddrr	ddRr	ddrr

Test Cross		Female ♀
Test Cross		dr
Male ♂	DR	DdRr
	Dr	Ddrr
	dR	ddRr
	dr	ddrr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to four (9:3:4).

What type of gene interaction is being shown?

A. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect B. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect C. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect D. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Correct MC

59f9_611c

Dihybrid Cross		Female ♀
Dihybrid Cross		GT	Gt	gT	gt
Male ♂	GT	GGTT	GGTt	GgTT	GgTt
	Gt	GGTt	GGtt	GgTt	Ggtt
	gT	GgTT	GgTt	ggTT	ggTt
	gt	GgTt	Ggtt	ggTt	ggtt

Test Cross		Female ♀
Test Cross		gt
Male ♂	GT	GgTt
	Gt	Ggtt
	gT	ggTt
	gt	ggtt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were twelve to three to one (12:3:1).

What type of gene interaction is being shown?

A. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect B. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect C. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Correct MC

8309_06f7

Dihybrid Cross		Female ♀
Dihybrid Cross		DG	Dg	dG	dg
Male ♂	DG	DDGG	DDGg	DdGG	DdGg
	Dg	DDGg	DDgg	DdGg	Ddgg
	dG	DdGG	DdGg	ddGG	ddGg
	dg	DdGg	Ddgg	ddGg	ddgg

Test Cross		Female ♀
Test Cross		dg
Male ♂	DG	DdGg
	Dg	Ddgg
	dG	ddGg
	dg	ddgg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to seven (9:7).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Correct B. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect MC

e975_aa0c

Dihybrid Cross		Female ♀
Dihybrid Cross		ER	Er	eR	er
Male ♂	ER	EERR	EERr	EeRR	EeRr
	Er	EERr	EErr	EeRr	Eerr
	eR	EeRR	EeRr	eeRR	eeRr
	er	EeRr	Eerr	eeRr	eerr

Test Cross		Female ♀
Test Cross		er
Male ♂	ER	EeRr
	Er	Eerr
	eR	eeRr
	er	eerr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to six to one (9:6:1).

What type of gene interaction is being shown?

A. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect B. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Correct D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect MC

326c_15df

Dihybrid Cross		Female ♀
Dihybrid Cross		RT	Rt	rT	rt
Male ♂	RT	RRTT	RRTt	RrTT	RrTt
	Rt	RRTt	RRtt	RrTt	Rrtt
	rT	RrTT	RrTt	rrTT	rrTt
	rt	RrTt	Rrtt	rrTt	rrtt

Test Cross		Female ♀
Test Cross		rt
Male ♂	RT	RrTt
	Rt	Rrtt
	rT	rrTt
	rt	rrtt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were fifteen to one (15:1).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect B. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect C. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Correct MC

44cc_3ba1

Dihybrid Cross		Female ♀
Dihybrid Cross		DE	De	dE	de
Male ♂	DE	DDEE	DDEe	DdEE	DdEe
	De	DDEe	DDee	DdEe	Ddee
	dE	DdEE	DdEe	ddEE	ddEe
	de	DdEe	Ddee	ddEe	ddee

Test Cross		Female ♀
Test Cross		de
Male ♂	DE	DdEe
	De	Ddee
	dE	ddEe
	de	ddee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were thirteen to three (13:3).

What type of gene interaction is being shown?

A. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Correct B. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect C. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect D. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect MC

9e62_47f0

Dihybrid Cross		Female ♀
Dihybrid Cross		DR	Dr	dR	dr
Male ♂	DR	DDRR	DDRr	DdRR	DdRr
	Dr	DDRr	DDrr	DdRr	Ddrr
	dR	DdRR	DdRr	ddRR	ddRr
	dr	DdRr	Ddrr	ddRr	ddrr

Test Cross		Female ♀
Test Cross		dr
Male ♂	DR	DdRr
	Dr	Ddrr
	dR	ddRr
	dr	ddrr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to three to one (9:3:3:1).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect B. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect D. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Correct MC

190e_8f14

Dihybrid Cross		Female ♀
Dihybrid Cross		DG	Dg	dG	dg
Male ♂	DG	DDGG	DDGg	DdGG	DdGg
	Dg	DDGg	DDgg	DdGg	Ddgg
	dG	DdGG	DdGg	ddGG	ddGg
	dg	DdGg	Ddgg	ddGg	ddgg

Test Cross		Female ♀
Test Cross		dg
Male ♂	DG	DdGg
	Dg	Ddgg
	dG	ddGg
	dg	ddgg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to four (9:3:4).

What type of gene interaction is being shown?

A. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect B. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect C. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Correct D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect MC

acdd_6c80

Dihybrid Cross		Female ♀
Dihybrid Cross		DR	Dr	dR	dr
Male ♂	DR	DDRR	DDRr	DdRR	DdRr
	Dr	DDRr	DDrr	DdRr	Ddrr
	dR	DdRR	DdRr	ddRR	ddRr
	dr	DdRr	Ddrr	ddRr	ddrr

Test Cross		Female ♀
Test Cross		dr
Male ♂	DR	DdRr
	Dr	Ddrr
	dR	ddRr
	dr	ddrr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were twelve to three to one (12:3:1).

What type of gene interaction is being shown?

A. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect B. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Correct C. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect D. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect MC

7c5b_4a27

Dihybrid Cross		Female ♀
Dihybrid Cross		GT	Gt	gT	gt
Male ♂	GT	GGTT	GGTt	GgTT	GgTt
	Gt	GGTt	GGtt	GgTt	Ggtt
	gT	GgTT	GgTt	ggTT	ggTt
	gt	GgTt	Ggtt	ggTt	ggtt

Test Cross		Female ♀
Test Cross		gt
Male ♂	GT	GgTt
	Gt	Ggtt
	gT	ggTt
	gt	ggtt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to seven (9:7).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Correct B. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect C. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect D. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect MC

aa59_d33d

Dihybrid Cross		Female ♀
Dihybrid Cross		ER	Er	eR	er
Male ♂	ER	EERR	EERr	EeRR	EeRr
	Er	EERr	EErr	EeRr	Eerr
	eR	EeRR	EeRr	eeRR	eeRr
	er	EeRr	Eerr	eeRr	eerr

Test Cross		Female ♀
Test Cross		er
Male ♂	ER	EeRr
	Er	Eerr
	eR	eeRr
	er	eerr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to six to one (9:6:1).

What type of gene interaction is being shown?

A. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect B. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Correct C. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect MC

6c6a_f88d

Dihybrid Cross		Female ♀
Dihybrid Cross		GT	Gt	gT	gt
Male ♂	GT	GGTT	GGTt	GgTT	GgTt
	Gt	GGTt	GGtt	GgTt	Ggtt
	gT	GgTT	GgTt	ggTT	ggTt
	gt	GgTt	Ggtt	ggTt	ggtt

Test Cross		Female ♀
Test Cross		gt
Male ♂	GT	GgTt
	Gt	Ggtt
	gT	ggTt
	gt	ggtt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were fifteen to one (15:1).

What type of gene interaction is being shown?

A. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect B. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect C. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Correct MC

895c_2ab7

Dihybrid Cross		Female ♀
Dihybrid Cross		ET	Et	eT	et
Male ♂	ET	EETT	EETt	EeTT	EeTt
	Et	EETt	EEtt	EeTt	Eett
	eT	EeTT	EeTt	eeTT	eeTt
	et	EeTt	Eett	eeTt	eett

Test Cross		Female ♀
Test Cross		et
Male ♂	ET	EeTt
	Et	Eett
	eT	eeTt
	et	eett

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were thirteen to three (13:3).

What type of gene interaction is being shown?

A. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect B. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Correct C. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect MC

04ef_36f3

Dihybrid Cross		Female ♀
Dihybrid Cross		DR	Dr	dR	dr
Male ♂	DR	DDRR	DDRr	DdRR	DdRr
	Dr	DDRr	DDrr	DdRr	Ddrr
	dR	DdRR	DdRr	ddRR	ddRr
	dr	DdRr	Ddrr	ddRr	ddrr

Test Cross		Female ♀
Test Cross		dr
Male ♂	DR	DdRr
	Dr	Ddrr
	dR	ddRr
	dr	ddrr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to three to one (9:3:3:1).

What type of gene interaction is being shown?

A. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect B. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect C. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect D. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Correct MC

1dbf_3cd5

Dihybrid Cross		Female ♀
Dihybrid Cross		EG	Eg	eG	eg
Male ♂	EG	EEGG	EEGg	EeGG	EeGg
	Eg	EEGg	EEgg	EeGg	Eegg
	eG	EeGG	EeGg	eeGG	eeGg
	eg	EeGg	Eegg	eeGg	eegg

Test Cross		Female ♀
Test Cross		eg
Male ♂	EG	EeGg
	Eg	Eegg
	eG	eeGg
	eg	eegg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to four (9:3:4).

What type of gene interaction is being shown?

A. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Correct B. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect MC

620e_d3b0

Dihybrid Cross		Female ♀
Dihybrid Cross		AE	Ae	aE	ae
Male ♂	AE	AAEE	AAEe	AaEE	AaEe
	Ae	AAEe	AAee	AaEe	Aaee
	aE	AaEE	AaEe	aaEE	aaEe
	ae	AaEe	Aaee	aaEe	aaee

Test Cross		Female ♀
Test Cross		ae
Male ♂	AE	AaEe
	Ae	Aaee
	aE	aaEe
	ae	aaee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were twelve to three to one (12:3:1).

What type of gene interaction is being shown?

A. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Correct B. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect MC

e5f9_dbf2

Dihybrid Cross		Female ♀
Dihybrid Cross		ER	Er	eR	er
Male ♂	ER	EERR	EERr	EeRR	EeRr
	Er	EERr	EErr	EeRr	Eerr
	eR	EeRR	EeRr	eeRR	eeRr
	er	EeRr	Eerr	eeRr	eerr

Test Cross		Female ♀
Test Cross		er
Male ♂	ER	EeRr
	Er	Eerr
	eR	eeRr
	er	eerr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to seven (9:7).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Correct B. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect MC

93b1_3db3

Dihybrid Cross		Female ♀
Dihybrid Cross		AG	Ag	aG	ag
Male ♂	AG	AAGG	AAGg	AaGG	AaGg
	Ag	AAGg	AAgg	AaGg	Aagg
	aG	AaGG	AaGg	aaGG	aaGg
	ag	AaGg	Aagg	aaGg	aagg

Test Cross		Female ♀
Test Cross		ag
Male ♂	AG	AaGg
	Ag	Aagg
	aG	aaGg
	ag	aagg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to six to one (9:6:1).

What type of gene interaction is being shown?

A. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect B. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Correct D. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect MC

2a57_211d

Dihybrid Cross		Female ♀
Dihybrid Cross		DE	De	dE	de
Male ♂	DE	DDEE	DDEe	DdEE	DdEe
	De	DDEe	DDee	DdEe	Ddee
	dE	DdEE	DdEe	ddEE	ddEe
	de	DdEe	Ddee	ddEe	ddee

Test Cross		Female ♀
Test Cross		de
Male ♂	DE	DdEe
	De	Ddee
	dE	ddEe
	de	ddee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were fifteen to one (15:1).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect B. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect C. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Correct D. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect MC

10d6_126a

Dihybrid Cross		Female ♀
Dihybrid Cross		AT	At	aT	at
Male ♂	AT	AATT	AATt	AaTT	AaTt
	At	AATt	AAtt	AaTt	Aatt
	aT	AaTT	AaTt	aaTT	aaTt
	at	AaTt	Aatt	aaTt	aatt

Test Cross		Female ♀
Test Cross		at
Male ♂	AT	AaTt
	At	Aatt
	aT	aaTt
	at	aatt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were thirteen to three (13:3).

What type of gene interaction is being shown?

A. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect B. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect C. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Correct D. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect MC

4e76_0b5d

Dihybrid Cross		Female ♀
Dihybrid Cross		ER	Er	eR	er
Male ♂	ER	EERR	EERr	EeRR	EeRr
	Er	EERr	EErr	EeRr	Eerr
	eR	EeRR	EeRr	eeRR	eeRr
	er	EeRr	Eerr	eeRr	eerr

Test Cross		Female ♀
Test Cross		er
Male ♂	ER	EeRr
	Er	Eerr
	eR	eeRr
	er	eerr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to three to one (9:3:3:1).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect B. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect C. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect D. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Correct MC

c3ff_3f03

Dihybrid Cross		Female ♀
Dihybrid Cross		ER	Er	eR	er
Male ♂	ER	EERR	EERr	EeRR	EeRr
	Er	EERr	EErr	EeRr	Eerr
	eR	EeRR	EeRr	eeRR	eeRr
	er	EeRr	Eerr	eeRr	eerr

Test Cross		Female ♀
Test Cross		er
Male ♂	ER	EeRr
	Er	Eerr
	eR	eeRr
	er	eerr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to four (9:3:4).

What type of gene interaction is being shown?

A. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect B. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Correct C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect D. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect MC

d010_f3c7

Dihybrid Cross		Female ♀
Dihybrid Cross		AT	At	aT	at
Male ♂	AT	AATT	AATt	AaTT	AaTt
	At	AATt	AAtt	AaTt	Aatt
	aT	AaTT	AaTt	aaTT	aaTt
	at	AaTt	Aatt	aaTt	aatt

Test Cross		Female ♀
Test Cross		at
Male ♂	AT	AaTt
	At	Aatt
	aT	aaTt
	at	aatt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were twelve to three to one (12:3:1).

What type of gene interaction is being shown?

A. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Correct B. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect C. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect MC

9acc_2458

Dihybrid Cross		Female ♀
Dihybrid Cross		DE	De	dE	de
Male ♂	DE	DDEE	DDEe	DdEE	DdEe
	De	DDEe	DDee	DdEe	Ddee
	dE	DdEE	DdEe	ddEE	ddEe
	de	DdEe	Ddee	ddEe	ddee

Test Cross		Female ♀
Test Cross		de
Male ♂	DE	DdEe
	De	Ddee
	dE	ddEe
	de	ddee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to seven (9:7).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Correct B. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect C. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect MC

de8b_f88d

Dihybrid Cross		Female ♀
Dihybrid Cross		DG	Dg	dG	dg
Male ♂	DG	DDGG	DDGg	DdGG	DdGg
	Dg	DDGg	DDgg	DdGg	Ddgg
	dG	DdGG	DdGg	ddGG	ddGg
	dg	DdGg	Ddgg	ddGg	ddgg

Test Cross		Female ♀
Test Cross		dg
Male ♂	DG	DdGg
	Dg	Ddgg
	dG	ddGg
	dg	ddgg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to six to one (9:6:1).

What type of gene interaction is being shown?

A. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Correct B. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect C. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect MC

6a36_5ea3

Dihybrid Cross		Female ♀
Dihybrid Cross		GR	Gr	gR	gr
Male ♂	GR	GGRR	GGRr	GgRR	GgRr
	Gr	GGRr	GGrr	GgRr	Ggrr
	gR	GgRR	GgRr	ggRR	ggRr
	gr	GgRr	Ggrr	ggRr	ggrr

Test Cross		Female ♀
Test Cross		gr
Male ♂	GR	GgRr
	Gr	Ggrr
	gR	ggRr
	gr	ggrr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were fifteen to one (15:1).

What type of gene interaction is being shown?

A. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect B. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Correct C. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect D. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect MC

cf74_b274

Dihybrid Cross		Female ♀
Dihybrid Cross		AE	Ae	aE	ae
Male ♂	AE	AAEE	AAEe	AaEE	AaEe
	Ae	AAEe	AAee	AaEe	Aaee
	aE	AaEE	AaEe	aaEE	aaEe
	ae	AaEe	Aaee	aaEe	aaee

Test Cross		Female ♀
Test Cross		ae
Male ♂	AE	AaEe
	Ae	Aaee
	aE	aaEe
	ae	aaee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were thirteen to three (13:3).

What type of gene interaction is being shown?

A. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Correct B. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect C. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect D. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect MC

7705_af20

Dihybrid Cross		Female ♀
Dihybrid Cross		AE	Ae	aE	ae
Male ♂	AE	AAEE	AAEe	AaEE	AaEe
	Ae	AAEe	AAee	AaEe	Aaee
	aE	AaEE	AaEe	aaEE	aaEe
	ae	AaEe	Aaee	aaEe	aaee

Test Cross		Female ♀
Test Cross		ae
Male ♂	AE	AaEe
	Ae	Aaee
	aE	aaEe
	ae	aaee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to three to one (9:3:3:1).

What type of gene interaction is being shown?

A. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Correct B. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect C. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect D. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect MC

09e8_9a2d

Dihybrid Cross		Female ♀
Dihybrid Cross		AG	Ag	aG	ag
Male ♂	AG	AAGG	AAGg	AaGG	AaGg
	Ag	AAGg	AAgg	AaGg	Aagg
	aG	AaGG	AaGg	aaGG	aaGg
	ag	AaGg	Aagg	aaGg	aagg

Test Cross		Female ♀
Test Cross		ag
Male ♂	AG	AaGg
	Ag	Aagg
	aG	aaGg
	ag	aagg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to four (9:3:4).

What type of gene interaction is being shown?

A. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect B. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect C. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Correct D. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect MC

9e4c_b7a7

Dihybrid Cross		Female ♀
Dihybrid Cross		DT	Dt	dT	dt
Male ♂	DT	DDTT	DDTt	DdTT	DdTt
	Dt	DDTt	DDtt	DdTt	Ddtt
	dT	DdTT	DdTt	ddTT	ddTt
	dt	DdTt	Ddtt	ddTt	ddtt

Test Cross		Female ♀
Test Cross		dt
Male ♂	DT	DdTt
	Dt	Ddtt
	dT	ddTt
	dt	ddtt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were twelve to three to one (12:3:1).

What type of gene interaction is being shown?

A. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect B. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect C. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Correct D. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect MC

6712_a7bd

Dihybrid Cross		Female ♀
Dihybrid Cross		DG	Dg	dG	dg
Male ♂	DG	DDGG	DDGg	DdGG	DdGg
	Dg	DDGg	DDgg	DdGg	Ddgg
	dG	DdGG	DdGg	ddGG	ddGg
	dg	DdGg	Ddgg	ddGg	ddgg

Test Cross		Female ♀
Test Cross		dg
Male ♂	DG	DdGg
	Dg	Ddgg
	dG	ddGg
	dg	ddgg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to seven (9:7).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Correct B. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect C. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect D. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect MC

87c1_6e17

Dihybrid Cross		Female ♀
Dihybrid Cross		DR	Dr	dR	dr
Male ♂	DR	DDRR	DDRr	DdRR	DdRr
	Dr	DDRr	DDrr	DdRr	Ddrr
	dR	DdRR	DdRr	ddRR	ddRr
	dr	DdRr	Ddrr	ddRr	ddrr

Test Cross		Female ♀
Test Cross		dr
Male ♂	DR	DdRr
	Dr	Ddrr
	dR	ddRr
	dr	ddrr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to six to one (9:6:1).

What type of gene interaction is being shown?

A. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Correct B. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect C. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect D. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect MC

96a1_00ac

Dihybrid Cross		Female ♀
Dihybrid Cross		ER	Er	eR	er
Male ♂	ER	EERR	EERr	EeRR	EeRr
	Er	EERr	EErr	EeRr	Eerr
	eR	EeRR	EeRr	eeRR	eeRr
	er	EeRr	Eerr	eeRr	eerr

Test Cross		Female ♀
Test Cross		er
Male ♂	ER	EeRr
	Er	Eerr
	eR	eeRr
	er	eerr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were fifteen to one (15:1).

What type of gene interaction is being shown?

A. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect B. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect C. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Correct D. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect MC

9391_d344

Dihybrid Cross		Female ♀
Dihybrid Cross		ET	Et	eT	et
Male ♂	ET	EETT	EETt	EeTT	EeTt
	Et	EETt	EEtt	EeTt	Eett
	eT	EeTT	EeTt	eeTT	eeTt
	et	EeTt	Eett	eeTt	eett

Test Cross		Female ♀
Test Cross		et
Male ♂	ET	EeTt
	Et	Eett
	eT	eeTt
	et	eett

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were thirteen to three (13:3).

What type of gene interaction is being shown?

A. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect B. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect C. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Correct D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect MC

4a0c_b68d

Dihybrid Cross		Female ♀
Dihybrid Cross		AG	Ag	aG	ag
Male ♂	AG	AAGG	AAGg	AaGG	AaGg
	Ag	AAGg	AAgg	AaGg	Aagg
	aG	AaGG	AaGg	aaGG	aaGg
	ag	AaGg	Aagg	aaGg	aagg

Test Cross		Female ♀
Test Cross		ag
Male ♂	AG	AaGg
	Ag	Aagg
	aG	aaGg
	ag	aagg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to three to one (9:3:3:1).

What type of gene interaction is being shown?

A. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect B. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect C. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Correct D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect MC

1bf3_d1e1

Dihybrid Cross		Female ♀
Dihybrid Cross		ER	Er	eR	er
Male ♂	ER	EERR	EERr	EeRR	EeRr
	Er	EERr	EErr	EeRr	Eerr
	eR	EeRR	EeRr	eeRR	eeRr
	er	EeRr	Eerr	eeRr	eerr

Test Cross		Female ♀
Test Cross		er
Male ♂	ER	EeRr
	Er	Eerr
	eR	eeRr
	er	eerr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to four (9:3:4).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect B. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect C. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Correct D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect MC

0ea4_65be

Dihybrid Cross		Female ♀
Dihybrid Cross		DE	De	dE	de
Male ♂	DE	DDEE	DDEe	DdEE	DdEe
	De	DDEe	DDee	DdEe	Ddee
	dE	DdEE	DdEe	ddEE	ddEe
	de	DdEe	Ddee	ddEe	ddee

Test Cross		Female ♀
Test Cross		de
Male ♂	DE	DdEe
	De	Ddee
	dE	ddEe
	de	ddee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were twelve to three to one (12:3:1).

What type of gene interaction is being shown?

A. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect B. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Correct C. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect D. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect MC

eb8a_0758

Dihybrid Cross		Female ♀
Dihybrid Cross		AG	Ag	aG	ag
Male ♂	AG	AAGG	AAGg	AaGG	AaGg
	Ag	AAGg	AAgg	AaGg	Aagg
	aG	AaGG	AaGg	aaGG	aaGg
	ag	AaGg	Aagg	aaGg	aagg

Test Cross		Female ♀
Test Cross		ag
Male ♂	AG	AaGg
	Ag	Aagg
	aG	aaGg
	ag	aagg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to seven (9:7).

What type of gene interaction is being shown?

A. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect B. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect C. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect D. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Correct MC

2acd_590e

Dihybrid Cross		Female ♀
Dihybrid Cross		AG	Ag	aG	ag
Male ♂	AG	AAGG	AAGg	AaGG	AaGg
	Ag	AAGg	AAgg	AaGg	Aagg
	aG	AaGG	AaGg	aaGG	aaGg
	ag	AaGg	Aagg	aaGg	aagg

Test Cross		Female ♀
Test Cross		ag
Male ♂	AG	AaGg
	Ag	Aagg
	aG	aaGg
	ag	aagg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to six to one (9:6:1).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect B. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Correct D. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect MC

3422_c5af

Dihybrid Cross		Female ♀
Dihybrid Cross		AD	Ad	aD	ad
Male ♂	AD	AADD	AADd	AaDD	AaDd
	Ad	AADd	AAdd	AaDd	Aadd
	aD	AaDD	AaDd	aaDD	aaDd
	ad	AaDd	Aadd	aaDd	aadd

Test Cross		Female ♀
Test Cross		ad
Male ♂	AD	AaDd
	Ad	Aadd
	aD	aaDd
	ad	aadd

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were fifteen to one (15:1).

What type of gene interaction is being shown?

A. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect B. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Correct C. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Incorrect D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect MC

a2fb_9d8a

Dihybrid Cross		Female ♀
Dihybrid Cross		DT	Dt	dT	dt
Male ♂	DT	DDTT	DDTt	DdTT	DdTt
	Dt	DDTt	DDtt	DdTt	Ddtt
	dT	DdTT	DdTt	ddTT	ddTt
	dt	DdTt	Ddtt	ddTt	ddtt

Test Cross		Female ♀
Test Cross		dt
Male ♂	DT	DdTt
	Dt	Ddtt
	dT	ddTt
	dt	ddtt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were thirteen to three (13:3).

What type of gene interaction is being shown?

A. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect B. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Correct C. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect D. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect MC

158d_753b

Dihybrid Cross		Female ♀
Dihybrid Cross		DG	Dg	dG	dg
Male ♂	DG	DDGG	DDGg	DdGG	DdGg
	Dg	DDGg	DDgg	DdGg	Ddgg
	dG	DdGG	DdGg	ddGG	ddGg
	dg	DdGg	Ddgg	ddGg	ddgg

Test Cross		Female ♀
Test Cross		dg
Male ♂	DG	DdGg
	Dg	Ddgg
	dG	ddGg
	dg	ddgg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to three to one (9:3:3:1).

What type of gene interaction is being shown?

A. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Correct B. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect C. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect D. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect MC

41e6_0e97

Dihybrid Cross		Female ♀
Dihybrid Cross		AT	At	aT	at
Male ♂	AT	AATT	AATt	AaTT	AaTt
	At	AATt	AAtt	AaTt	Aatt
	aT	AaTT	AaTt	aaTT	aaTt
	at	AaTt	Aatt	aaTt	aatt

Test Cross		Female ♀
Test Cross		at
Male ♂	AT	AaTt
	At	Aatt
	aT	aaTt
	at	aatt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to four (9:3:4).

What type of gene interaction is being shown?

A. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect B. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect C. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Correct D. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect MC

1534_8117

Dihybrid Cross		Female ♀
Dihybrid Cross		EG	Eg	eG	eg
Male ♂	EG	EEGG	EEGg	EeGG	EeGg
	Eg	EEGg	EEgg	EeGg	Eegg
	eG	EeGG	EeGg	eeGG	eeGg
	eg	EeGg	Eegg	eeGg	eegg

Test Cross		Female ♀
Test Cross		eg
Male ♂	EG	EeGg
	Eg	Eegg
	eG	eeGg
	eg	eegg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were twelve to three to one (12:3:1).

What type of gene interaction is being shown?

A. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Correct B. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect C. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect D. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect MC

57ab_1b50

Dihybrid Cross		Female ♀
Dihybrid Cross		GT	Gt	gT	gt
Male ♂	GT	GGTT	GGTt	GgTT	GgTt
	Gt	GGTt	GGtt	GgTt	Ggtt
	gT	GgTT	GgTt	ggTT	ggTt
	gt	GgTt	Ggtt	ggTt	ggtt

Test Cross		Female ♀
Test Cross		gt
Male ♂	GT	GgTt
	Gt	Ggtt
	gT	ggTt
	gt	ggtt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to seven (9:7).

What type of gene interaction is being shown?

A. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Correct B. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect D. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect MC

ba71_3cd5

Dihybrid Cross		Female ♀
Dihybrid Cross		AE	Ae	aE	ae
Male ♂	AE	AAEE	AAEe	AaEE	AaEe
	Ae	AAEe	AAee	AaEe	Aaee
	aE	AaEE	AaEe	aaEE	aaEe
	ae	AaEe	Aaee	aaEe	aaee

Test Cross		Female ♀
Test Cross		ae
Male ♂	AE	AaEe
	Ae	Aaee
	aE	aaEe
	ae	aaee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to six to one (9:6:1).

What type of gene interaction is being shown?

A. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect B. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect C. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Correct D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect MC

2078_40b1

Dihybrid Cross		Female ♀
Dihybrid Cross		DG	Dg	dG	dg
Male ♂	DG	DDGG	DDGg	DdGG	DdGg
	Dg	DDGg	DDgg	DdGg	Ddgg
	dG	DdGG	DdGg	ddGG	ddGg
	dg	DdGg	Ddgg	ddGg	ddgg

Test Cross		Female ♀
Test Cross		dg
Male ♂	DG	DdGg
	Dg	Ddgg
	dG	ddGg
	dg	ddgg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were fifteen to one (15:1).

What type of gene interaction is being shown?

A. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect B. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect C. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Correct MC

b91e_8030

Dihybrid Cross		Female ♀
Dihybrid Cross		AD	Ad	aD	ad
Male ♂	AD	AADD	AADd	AaDD	AaDd
	Ad	AADd	AAdd	AaDd	Aadd
	aD	AaDD	AaDd	aaDD	aaDd
	ad	AaDd	Aadd	aaDd	aadd

Test Cross		Female ♀
Test Cross		ad
Male ♂	AD	AaDd
	Ad	Aadd
	aD	aaDd
	ad	aadd

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were thirteen to three (13:3).

What type of gene interaction is being shown?

A. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect B. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect C. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Correct D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect MC

8e93_6e17

Dihybrid Cross		Female ♀
Dihybrid Cross		DE	De	dE	de
Male ♂	DE	DDEE	DDEe	DdEE	DdEe
	De	DDEe	DDee	DdEe	Ddee
	dE	DdEE	DdEe	ddEE	ddEe
	de	DdEe	Ddee	ddEe	ddee

Test Cross		Female ♀
Test Cross		de
Male ♂	DE	DdEe
	De	Ddee
	dE	ddEe
	de	ddee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to three to one (9:3:3:1).

What type of gene interaction is being shown?

A. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect B. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect C. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect D. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Correct MC

0a37_c139

Dihybrid Cross		Female ♀
Dihybrid Cross		DE	De	dE	de
Male ♂	DE	DDEE	DDEe	DdEE	DdEe
	De	DDEe	DDee	DdEe	Ddee
	dE	DdEE	DdEe	ddEE	ddEe
	de	DdEe	Ddee	ddEe	ddee

Test Cross		Female ♀
Test Cross		de
Male ♂	DE	DdEe
	De	Ddee
	dE	ddEe
	de	ddee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to four (9:3:4).

What type of gene interaction is being shown?

A. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect B. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect C. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect D. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Correct MC

020f_0420

Dihybrid Cross		Female ♀
Dihybrid Cross		AD	Ad	aD	ad
Male ♂	AD	AADD	AADd	AaDD	AaDd
	Ad	AADd	AAdd	AaDd	Aadd
	aD	AaDD	AaDd	aaDD	aaDd
	ad	AaDd	Aadd	aaDd	aadd

Test Cross		Female ♀
Test Cross		ad
Male ♂	AD	AaDd
	Ad	Aadd
	aD	aaDd
	ad	aadd

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were twelve to three to one (12:3:1).

What type of gene interaction is being shown?

A. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect B. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Incorrect C. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Correct MC

8b93_aacf

Dihybrid Cross		Female ♀
Dihybrid Cross		DE	De	dE	de
Male ♂	DE	DDEE	DDEe	DdEE	DdEe
	De	DDEe	DDee	DdEe	Ddee
	dE	DdEE	DdEe	ddEE	ddEe
	de	DdEe	Ddee	ddEe	ddee

Test Cross		Female ♀
Test Cross		de
Male ♂	DE	DdEe
	De	Ddee
	dE	ddEe
	de	ddee

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to seven (9:7).

What type of gene interaction is being shown?

A. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect B. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect C. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect D. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Correct MC

b2c2_6c3a

Dihybrid Cross		Female ♀
Dihybrid Cross		DT	Dt	dT	dt
Male ♂	DT	DDTT	DDTt	DdTT	DdTt
	Dt	DDTt	DDtt	DdTt	Ddtt
	dT	DdTT	DdTt	ddTT	ddTt
	dt	DdTt	Ddtt	ddTt	ddtt

Test Cross		Female ♀
Test Cross		dt
Male ♂	DT	DdTt
	Dt	Ddtt
	dT	ddTt
	dt	ddtt

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to six to one (9:6:1).

What type of gene interaction is being shown?

A. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect B. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect C. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect D. These two genes show duplicate interaction epistasis When either gene is dominant, it hides the effects of the other gene. Correct MC

d632_0374

Dihybrid Cross		Female ♀
Dihybrid Cross		EG	Eg	eG	eg
Male ♂	EG	EEGG	EEGg	EeGG	EeGg
	Eg	EEGg	EEgg	EeGg	Eegg
	eG	EeGG	EeGg	eeGG	eeGg
	eg	EeGg	Eegg	eeGg	eegg

Test Cross		Female ♀
Test Cross		eg
Male ♂	EG	EeGg
	Eg	Eegg
	eG	eeGg
	eg	eegg

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were fifteen to one (15:1).

What type of gene interaction is being shown?

A. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect B. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Incorrect C. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect D. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Correct MC

f1f7_e57a

Dihybrid Cross		Female ♀
Dihybrid Cross		DR	Dr	dR	dr
Male ♂	DR	DDRR	DDRr	DdRR	DdRr
	Dr	DDRr	DDrr	DdRr	Ddrr
	dR	DdRR	DdRr	ddRR	ddRr
	dr	DdRr	Ddrr	ddRr	ddrr

Test Cross		Female ♀
Test Cross		dr
Male ♂	DR	DdRr
	Dr	Ddrr
	dR	ddRr
	dr	ddrr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were thirteen to three (13:3).

What type of gene interaction is being shown?

A. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect B. These two genes show duplicate dominant epistasis When either gene is dominant, it shows the same phenotype. Incorrect C. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect D. These two genes show dominant and recessive epistasis When one gene is dominant and another gene is homozygous recessive, it creates a new phenotype. Correct MC

4a2a_3dfd

Dihybrid Cross		Female ♀
Dihybrid Cross		DR	Dr	dR	dr
Male ♂	DR	DDRR	DDRr	DdRR	DdRr
	Dr	DDRr	DDrr	DdRr	Ddrr
	dR	DdRR	DdRr	ddRR	ddRr
	dr	DdRr	Ddrr	ddRr	ddrr

Test Cross		Female ♀
Test Cross		dr
Male ♂	DR	DdRr
	Dr	Ddrr
	dR	ddRr
	dr	ddrr

Above are the phenotypic results from a dihybrid cross and double heterozygote test cross. The phenotypes were nine to three to three to one (9:3:3:1).

What type of gene interaction is being shown?

A. These two genes show recessive epistasis When the first gene is homozygous recessive, it hides the phenotype of the second gene. Incorrect B. These two genes show duplicate recessive epistasis When either gene is homozygous recessive, it hides the effect of the other gene. Incorrect C. These two genes show digenic inheritance Interaction of two genes affect the phenotypic expression of a single trait. Correct D. These two genes show dominant epistasis When one gene is dominant, it hides the phenotype of the other gene. Incorrect