Question

(problem 24a, part 1) in drosophila, yellow body is due to an x-linked gene (xy) that is recessive to the gene for gray body (x+). a homozygous gray female is crossed with a yellow male. what are the phenotypes of the f1 progeny?

Answer 1

I believe that the phenotypes of the F1 progeny will all be gray. 
Gene linkage is the tendency of DNA sequences that are close together on a chromosome such that they are inherited together during the process of meiosis phase of sexual reproduction. In Drosophila the eye color and body color is sex linked.