3e4e_b2bd

Two-Point Test Cross Problem

A test cross is a way to explore the relationship between genes and their respective alleles. It is a useful tool for genetic mapping and deciphering the inheritance of traits. Specifically, a two-point test cross examines two (2) genes at the same time to learn about their assortment in gamete formation.

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

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

Characteristics of Recessive Phenotypes

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

Gene M is associated with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

Phenotype	Genotypes		Progeny Count
dewy, mushy	d	m	927
dewy	d	+	2,177
mushy	+	m	2,163
wildtype	+	+	933
TOTAL =			6,200

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

Question

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

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

631c_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

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

Phenotype	Genotypes		Progeny Count
prickly, rusty	p	r	2,923
prickly	p	+	273
rusty	+	r	223
wildtype	+	+	2,781
TOTAL =			6,200

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

b421_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene M is analogous to the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

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

Phenotype	Genotypes		Progeny Count
mushy, nerdy	m	n	1,716
mushy	m	+	2,710
nerdy	+	n	2,746
wildtype	+	+	1,628
TOTAL =			8,800

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

4afc_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

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

Phenotype	Genotypes		Progeny Count
waxy, xanthic	w	x	869
waxy	w	+	1,927
xanthic	+	x	1,853
wildtype	+	+	751
TOTAL =			5,400

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

28e0_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

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

Phenotype	Genotypes		Progeny Count
kidney, xanthic	k	x	1,914
kidney	k	+	380
xanthic	+	x	402
wildtype	+	+	1,904
TOTAL =			4,600

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

a916_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene A is linked with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.

Gene H is connected with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.

Phenotype	Genotypes		Progeny Count
artsy, horsey	a	h	435
artsy	a	+	2,848
horsey	+	h	2,894
wildtype	+	+	423
TOTAL =			6,600

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

42b9_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene E is analogous to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.

Gene M is connected with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

Phenotype	Genotypes		Progeny Count
eery, mushy	e	m	528
eery	e	+	1,758
mushy	+	m	1,738
wildtype	+	+	576
TOTAL =			4,600

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

35b7_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene F is correlated with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.

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

Phenotype	Genotypes		Progeny Count
fuzzy, xanthic	f	x	411
fuzzy	f	+	2,758
xanthic	+	x	2,810
wildtype	+	+	421
TOTAL =			6,400

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

dc58_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene C is related to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.

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

Phenotype	Genotypes		Progeny Count
chummy, jerky	c	j	631
chummy	c	+	2,793
jerky	+	j	2,877
wildtype	+	+	699
TOTAL =			7,000

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

52ff_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

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

Phenotype	Genotypes		Progeny Count
kidney, xanthic	k	x	522
kidney	k	+	111
xanthic	+	x	81
wildtype	+	+	486
TOTAL =			1,200

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

5201_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

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

Phenotype	Genotypes		Progeny Count
nerdy, yucky	n	y	3,571
nerdy	n	+	73
yucky	+	y	71
wildtype	+	+	3,485
TOTAL =			7,200

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

109d_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene M is linked with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

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

Phenotype	Genotypes		Progeny Count
mushy, yucky	m	y	377
mushy	m	+	1,286
yucky	+	y	1,366
wildtype	+	+	371
TOTAL =			3,400

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

4ad7_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

Gene C is associated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.

Phenotype	Genotypes		Progeny Count
bumpy, chummy	b	c	984
bumpy	b	+	3,703
chummy	+	c	3,629
wildtype	+	+	1,084
TOTAL =			9,400

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

910f_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

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

Phenotype	Genotypes		Progeny Count
jerky, yucky	j	y	2,401
jerky	j	+	932
yucky	+	y	916
wildtype	+	+	2,351
TOTAL =			6,600

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

6b22_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene F is affiliated with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.

Gene T is analogous to the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes		Progeny Count
fuzzy, tipsy	f	t	888
fuzzy	f	+	203
tipsy	+	t	171
wildtype	+	+	938
TOTAL =			2,200

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

f203_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene T is correlated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

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

Phenotype	Genotypes		Progeny Count
tipsy, waxy	t	w	212
tipsy	t	+	577
waxy	+	w	591
wildtype	+	+	220
TOTAL =			1,600

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

eaba_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

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

Phenotype	Genotypes		Progeny Count
prickly, yucky	p	y	329
prickly	p	+	4,166
yucky	+	y	4,204
wildtype	+	+	301
TOTAL =			9,000

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

88d6_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

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

Phenotype	Genotypes		Progeny Count
waxy, xanthic	w	x	1,848
waxy	w	+	140
xanthic	+	x	140
wildtype	+	+	1,872
TOTAL =			4,000

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

58e6_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

Gene T is connected with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes		Progeny Count
rusty, tipsy	r	t	331
rusty	r	+	2,064
tipsy	+	t	1,892
wildtype	+	+	313
TOTAL =			4,600

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

1657_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene H is connected with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.

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

Phenotype	Genotypes		Progeny Count
horsey, nerdy	h	n	807
horsey	h	+	1,688
nerdy	+	n	1,612
wildtype	+	+	893
TOTAL =			5,000

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

c9d2_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene M is related to the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

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

Phenotype	Genotypes		Progeny Count
mushy, prickly	m	p	413
mushy	m	+	1,197
prickly	+	p	1,203
wildtype	+	+	387
TOTAL =			3,200

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

880c_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene F is connected with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.

Gene M is connected with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

Phenotype	Genotypes		Progeny Count
fuzzy, mushy	f	m	393
fuzzy	f	+	2,458
mushy	+	m	2,530
wildtype	+	+	419
TOTAL =			5,800

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

3e06_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene C is affiliated with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.

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

Phenotype	Genotypes		Progeny Count
chummy, waxy	c	w	1,320
chummy	c	+	2,126
waxy	+	w	2,214
wildtype	+	+	1,340
TOTAL =			7,000

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

02ca_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

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

Phenotype	Genotypes		Progeny Count
prickly, yucky	p	y	1,152
prickly	p	+	2,738
yucky	+	y	2,722
wildtype	+	+	1,188
TOTAL =			7,800

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

8bc0_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene T is affiliated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

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

Phenotype	Genotypes		Progeny Count
tipsy, xanthic	t	x	459
tipsy	t	+	2,289
xanthic	+	x	2,247
wildtype	+	+	405
TOTAL =			5,400

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

81e5_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

Gene F is analogous to the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.

Phenotype	Genotypes		Progeny Count
bumpy, fuzzy	b	f	334
bumpy	b	+	956
fuzzy	+	f	968
wildtype	+	+	342
TOTAL =			2,600

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

c64c_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

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

Phenotype	Genotypes		Progeny Count
dewy, rusty	d	r	2,490
dewy	d	+	1,041
rusty	+	r	1,059
wildtype	+	+	2,410
TOTAL =			7,000

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

8d65_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

Gene F is connected with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.

Phenotype	Genotypes		Progeny Count
dewy, fuzzy	d	f	452
dewy	d	+	1,764
fuzzy	+	f	1,756
wildtype	+	+	428
TOTAL =			4,400

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

168f_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene H is linked with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.

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

Phenotype	Genotypes		Progeny Count
horsey, rusty	h	r	153
horsey	h	+	755
rusty	+	r	739
wildtype	+	+	153
TOTAL =			1,800

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

2811_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene A is related to the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.

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

Phenotype	Genotypes		Progeny Count
artsy, rusty	a	r	199
artsy	a	+	2,351
rusty	+	r	2,485
wildtype	+	+	165
TOTAL =			5,200

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

1c7e_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene H is analogous to the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.

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

Phenotype	Genotypes		Progeny Count
horsey, xanthic	h	x	965
horsey	h	+	3,043
xanthic	+	x	3,037
wildtype	+	+	955
TOTAL =			8,000

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

0c6e_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene C is connected with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.

Gene T is correlated with the 'tipsy' phenotype. A fruit fly that is homozygous recessive for Gene T moves in an erratic path, suggesting a lack of coordination, as if intoxicated.

Phenotype	Genotypes		Progeny Count
chummy, tipsy	c	t	1,212
chummy	c	+	3,252
tipsy	+	t	3,172
wildtype	+	+	1,164
TOTAL =			8,800

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

5f8d_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene C is linked with the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.

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

Phenotype	Genotypes		Progeny Count
chummy, xanthic	c	x	3,521
chummy	c	+	796
xanthic	+	x	752
wildtype	+	+	3,531
TOTAL =			8,600

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

14ec_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene A is correlated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.

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

Phenotype	Genotypes		Progeny Count
artsy, kidney	a	k	2,627
artsy	a	+	1,091
kidney	+	k	1,129
wildtype	+	+	2,553
TOTAL =			7,400

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

8497_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

Gene M is linked with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

Phenotype	Genotypes		Progeny Count
jerky, mushy	j	m	673
jerky	j	+	1,584
mushy	+	m	1,636
wildtype	+	+	707
TOTAL =			4,600

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

2fc8_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene E is related to the 'eery' phenotype. A fruit fly that is homozygous recessive for Gene E appears to have something off, crooked limbs and other twisted appendages.

Gene F is linked with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.

Phenotype	Genotypes		Progeny Count
eery, fuzzy	e	f	4,327
eery	e	+	438
fuzzy	+	f	408
wildtype	+	+	4,227
TOTAL =			9,400

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

5430_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

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

Phenotype	Genotypes		Progeny Count
kidney, prickly	k	p	266
kidney	k	+	2,062
prickly	+	p	2,032
wildtype	+	+	240
TOTAL =			4,600

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

a64a_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene A is correlated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.

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

Phenotype	Genotypes		Progeny Count
artsy, yucky	a	y	3,464
artsy	a	+	362
yucky	+	y	322
wildtype	+	+	3,452
TOTAL =			7,600

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

b853_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene H is linked with the 'horsey' phenotype. A fruit fly that is homozygous recessive for Gene H is quite big and strong-looking, much larger than your typical fruit fly.

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

Phenotype	Genotypes		Progeny Count
horsey, rusty	h	r	4,152
horsey	h	+	186
rusty	+	r	158
wildtype	+	+	4,104
TOTAL =			8,600

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

2bf7_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene F is correlated with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.

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

Phenotype	Genotypes		Progeny Count
fuzzy, yucky	f	y	401
fuzzy	f	+	984
yucky	+	y	1,004
wildtype	+	+	411
TOTAL =			2,800

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

185f_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

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

Phenotype	Genotypes		Progeny Count
kidney, waxy	k	w	1,239
kidney	k	+	2,752
waxy	+	w	2,768
wildtype	+	+	1,241
TOTAL =			8,000

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

4b44_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene A is connected with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.

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

Phenotype	Genotypes		Progeny Count
artsy, waxy	a	w	1,876
artsy	a	+	759
waxy	+	w	749
wildtype	+	+	1,816
TOTAL =			5,200

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

a55b_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene C is analogous to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.

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

Phenotype	Genotypes		Progeny Count
chummy, kidney	c	k	2,882
chummy	c	+	1,308
kidney	+	k	1,296
wildtype	+	+	2,914
TOTAL =			8,400

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

4952_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene A is connected with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.

Gene C is analogous to the 'chummy' phenotype. A fruit fly that is homozygous recessive for Gene C shows behavior where it always maintains a close distance to other flies.

Phenotype	Genotypes		Progeny Count
artsy, chummy	a	c	633
artsy	a	+	2,643
chummy	+	c	2,637
wildtype	+	+	687
TOTAL =			6,600

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

d2c4_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene A is related to the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.

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

Phenotype	Genotypes		Progeny Count
artsy, bumpy	a	b	2,179
artsy	a	+	1,055
bumpy	+	b	1,123
wildtype	+	+	2,243
TOTAL =			6,600

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

7eac_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene A is correlated with the 'artsy' phenotype. A fruit fly that is homozygous recessive for Gene A has wings that are colorful and distinctive patterns.

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

Phenotype	Genotypes		Progeny Count
artsy, kidney	a	k	3,849
artsy	a	+	327
kidney	+	k	345
wildtype	+	+	3,879
TOTAL =			8,400

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

14fd_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

Gene F is correlated with the 'fuzzy' phenotype. A fruit fly that is homozygous recessive for Gene F is covered in a dense layer of hairs, giving it a soft appearance.

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

Phenotype	Genotypes		Progeny Count
fuzzy, waxy	f	w	2,802
fuzzy	f	+	782
waxy	+	w	802
wildtype	+	+	2,814
TOTAL =			7,200

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

2aa8_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

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

Phenotype	Genotypes		Progeny Count
kidney, rusty	k	r	180
kidney	k	+	2,095
rusty	+	r	2,137
wildtype	+	+	188
TOTAL =			4,600

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect MC

94de_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

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

Phenotype	Genotypes		Progeny Count
prickly, yucky	p	y	2,566
prickly	p	+	302
yucky	+	y	336
wildtype	+	+	2,596
TOTAL =			5,800

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

Question

cis Correct trans Incorrect both Incorrect neither Incorrect cannot be determined Incorrect MC

1094_b2bd

Two-Point Test Cross Problem

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

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

Characteristics of Recessive Phenotypes

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

Gene M is linked with the 'mushy' phenotype. A fruit fly that is homozygous recessive for Gene M feels soft to the touch and unusually squishy, unlike the usual firmness.

Phenotype	Genotypes		Progeny Count
dewy, mushy	d	m	619
dewy	d	+	1,598
mushy	+	m	1,570
wildtype	+	+	613
TOTAL =			4,400

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

Question

cis Incorrect trans Correct both Incorrect neither Incorrect cannot be determined Incorrect