In cats, stripes are caused by the dominant allele T, while tt individuals are s

Question

In cats, stripes are caused by the dominant allele T, while tt individuals are solid-colored. Short hair is caused by a dominant allele S, while ss cats have long hair. A long-haired cat with stripes whose mother was solid-colored and short-haired mates with a short-haired, solid-colored cat whose mother was long-haired and solid-colored. What kinds of kittens can arise from this mating, and in what proportions? 2. 3 In tomatoes, red fruit (R) is dominant to yellow (rr) fruit and purple stems (P) are dominant to green stems (pp). The progeny from one mating consisted of 305 red fruit, purple stem plants; 328 red fruit, green stem plants; 110 yellow fruit, purple stem plants; and 97 yellow fruit, green stem plants. What was the genotype of the parents in this cross?

Explanation / Answer

2. For the first parent, as the mother was solid colored, it must have inherited at least one of the recessive alleles for that gene. The genotype for this parent is thus Ttss, and the possible gametes are Ts and ts.

For the second parent, the mother was long haired, so atleast one of the alleles responsible for it must be inherited. The genotype of this parent is ttSs, and the possible gametes are tS and ts.

A cross between the two would look like:

We see that the phenotypic proportions here is 1:1:1:1

Ts ts tS TtSs (striped, short hair) ttSs (solid, short hair) ts Ttss (striped, long hair) ttss (solid, long hair)

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

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