Mutation affects

There are several mutant eye colors seen in Drosophila, one of which is purple. Homozygous wild red-eyed flies are pr+pr+ and flies with purple eyes are prpr. Another mutation affects the length of the wings: vestigial (vg) gives the wings a ‘scrunched up’ look. Homozygous normal-winged flies (wild type) are vg+vg+ and vestigial-winged flies are vgvg. The wild type alleles (pr+ and vg+) are dominant and both genes are autosomal.