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\"The sex chromosomes in birds are designated Z and W, and the male is the homom

ID: 89112 • Letter: #

Question

"The sex chromosomes in birds are designated Z and W, and the male is the homomorphic sex (ZZ) and the female heteromorphic (ZW"; Stevens. 1997).

Grant finds out that dilute homing pigeons sell for even more than slate pigeons. Dilute pigeons are “true” silver. Dilute is a sex-linked recessive trait (z-linked, represented by q). Grant decides to mate his smartest bird, Keith who is not silver (or a carrier), with his silver bird, Meredith.

What is Keith’s genotype?

ZqW

ZW

ZqZq

a.

ZqW

b.

ZW

c.

ZqZq

d. ZZ Male Z Z Sperm Possible Offspring Eggs Female

Explanation / Answer

Answer:

b. ZW

Explanation:

ZZ(Keith, Non silver) & ZqZq (Meredith, Silver)