Question

A cross between yellow body and white eyes and wild parent in a drosophila

Answer 1

A cross in Drosophila involved the recessive, X-linked genes yellow body (y), white eyes (w), and cut wings (ct). A yellow-bodied, white-eyed female with normal wings was crossed to a male whose eyes and body were normal, but whose wings were cut. The F1 females were wild type for all three traits, while the F1 males expressed the yellow-body, white-eye traits. The cross was carried to F2 progeny, and only male offspring were tallied.