If a male bird that is heterozygous for a recessive Z-linked mutation is crossed to a wild-type female, what proportion of the progeny will be mutant males?

Question

Quizplus · Accepted Answer

In birds, males are ZZ and females are ZW. A heterozygous male (Z^mZ) crossed with a wild-type female (ZW) will produce Z^mZ (wild-type males) and Z^mW (mutant females), so no mutant males will be produced.

If a Male Bird That Is Heterozygous for a Recessive