In fruit flies the gene (b) for black body is recessive to itsallele for gray. The gene (h) for hairy body is recessive for itsallele for wild type. A gray, wild-type female was crossed with ablack, hairy male. The f1 females were crossed to black, hairymales, and the following results were obtained: gray, wild-type:206; gray, hairy 198; black, wild-type 203; and black, hairy 205.Is linkage present? If so, what is the percent of crossingover?