Linked & Sex-Linked Genes
...nes would be: Mutations in Fruit Flies. The normal body color is gray (B), while the mutant allele is expressed as black(b). The other mutation is the type of wings. The mutant allele is vestigial wings (v). Because the two genes are linked, a heterozygous fly for gray body and normal wings would have BV on one chromosome and bv on the homologous chromosome. Since the two genes are on the same chromosome and they cannot assort independently, the gray-normal fly produces only two kinds of gametes: BV and bv. When Females a (XX) inherit sex-linked gene, they receive two copies of the gene; one is on each chromosome. But males (XY) only inherit one copy because the X-chromosome delivers the gene. So, whatever allele is on the X...