There are a lot of wing mutations for Drosophila. You areobserving a new mutation that codes for crinkled wings.

a. When a true-breeding crinkled-wing fly is crossed with atrue-breeding apterous (no wings) fly, all of the F1 progeny arewild type. The same results are seen for the reciprocalparental cross. What can you conclude about these mutationsand the gene(s) that code for them? Explain answer.

b. Two of the F1 flies were then crossed producing a large F2generation consisting only of wild type, crinkled, and apterousflies in a 9:3:4 ratio. What can you conclude from progenyfrom this cross? Explain answer.