A wild-type fruit fly (heterozygous for gray body color and…

A wild-type fruit fly (heterozygous for gray body color and normal wings) is mated with a black fly with vestigial wings. The offspring have the following phenotypic distribution: wild-type (gray-normal), 778; black vestigial, 785; black normal, 158; gray vestigial, 162.   What is the recombination frequency between the color and wing genes?