A pure-breeding female fruit fly with a yellow body is crossed to a pure-breeding male fruit fly with a gray body. All female offspring from the cross have gray bodies and all males have yellow bodies. Body color is likely a(n)__________trait, and the gray allele is ________.

Question

Quizplus · Accepted Answer

The inheritance pattern suggests that body color is an X-linked trait. Since all female offspring have gray bodies, the gray allele is dominant and located on the X chromosome. The males inherit their single X chromosome from their mother, which carries the recessive yellow allele.

A Pure-Breeding Female Fruit Fly with a Yellow Body Is