3. In cats, yellow/black coat color is due to a gene with two alleles. Yellow co

Question

3. In cats, yellow/black coat color is due to a gene with two alleles. Yellow coat color is due to the allele b and black coat color is due to the allele B. The alleles b and B are X-linked (located on the X chromosome). Heterozygous cats have both black and yellow patches of fur (tortoise shell colored) a. What kinds of offspring would be expected from the mating of a black male with a yellow female and in what proportions would each kind occur? b. What kinds of offspring would be expected from the mating between a yellow male with a tortoise shell female and in what proportions would each kind occur?

Explanation / Answer

Answer:

(a)

XBY (Black male) x XbXb (yellow female)

Offsprings

Xb

Xb

XB

XBXb (tortoise female)

XBXb (tortoise female)

Y

XbY (yellow male)

XbY (yellow male)

All males are yellow and

All females are tortoise fur

Proportion of phenotypes

1 yellow : 1 tortoise shell

(b)

XBXb (tortoise shell female) x XbY (yellow male)

Offsprings

XB

Xb

Xb

XBXb (tortoise female)

XbXb (yellow female)

Y

XBY (Black male)

XbY (yellow male)

2 yellow

1 tortoise

1 Black

Xb

Xb

XB

XBXb (tortoise female)

XBXb (tortoise female)

Y

XbY (yellow male)

XbY (yellow male)

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.