7. In rats, the allele for kinky hair (h) is recessive to the allele for normal hair (H), and the allele for short tail (e) is recessive to the allele for long tail (T). The genes for hair kinkiness and tail length are found close together on the same chromosome (i.e., they are linked). "Backalley Bob" is a rat who is heterozygous for both hair type and tail length. Bob's father had kinky hair and a long tail, and was homozygous for both traits. Bob met and married "Riverboat Rita," a kinky-haired, short-tailed rat. a. Give the genotype of cach of the following: Backalley Bob: Backalley Bob's father:. Riverboat Rita: b. Draw a Punnett square to illustrate the cross between Backalley Bob and Riverboat Rita. Remember-the genes are linked. Assume that there is no crossing over. c. Give the predicted genotypic ratio of the offspring of this cross, if there is no crossing over.

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7. In rats, the allele for kinky hair (h) is recessive to the allele for normal hair (H), and
the allele for short tail (t) is recessive to the allele for long tail (T). The genes for hair
kinkiness and tail length are found close together on the same chromosome (i.e., they are
linked).
"Backalley Bob" is a rat who is heterozygous for both hair type and tail length.
Bobs father had kinky hair and a long tail, and was homozygous for both traits. Bob
met and married "Riverboat Rita," a kinky-haired, short-tailed rat.
a. Give the genotype of cach of the following:
Backalley Bob:_
Backalley Bob's father:
Riverboat Rita:
b. Draw a Punnett square to illustrate the cross between Backalley Bob and Riverboat
Rita. Remember-the genes are linked. Assume that there is no crossing over.
c. Give the predicted genotypic ratio of the offspring of this cross, if there is
no crossing over.
d. Draw a chromosome diagram to show Backalley Bob's cell in prometaphase I of
meiosis. Assume no crossovers have occurred. Label alleles on each chromatid you
draw.
Transcribed Image Text:7. In rats, the allele for kinky hair (h) is recessive to the allele for normal hair (H), and the allele for short tail (t) is recessive to the allele for long tail (T). The genes for hair kinkiness and tail length are found close together on the same chromosome (i.e., they are linked). "Backalley Bob" is a rat who is heterozygous for both hair type and tail length. Bobs father had kinky hair and a long tail, and was homozygous for both traits. Bob met and married "Riverboat Rita," a kinky-haired, short-tailed rat. a. Give the genotype of cach of the following: Backalley Bob:_ Backalley Bob's father: Riverboat Rita: b. Draw a Punnett square to illustrate the cross between Backalley Bob and Riverboat Rita. Remember-the genes are linked. Assume that there is no crossing over. c. Give the predicted genotypic ratio of the offspring of this cross, if there is no crossing over. d. Draw a chromosome diagram to show Backalley Bob's cell in prometaphase I of meiosis. Assume no crossovers have occurred. Label alleles on each chromatid you draw.
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