Fruit fly bodies are typically light gray. A fruit fly mutant is identified with a dark gray body. It is known that the allele that causes dark bodies is recessive to the allele that produces light bodies. A true-breeding (homozygous) male fly with a light body is mated with a true-breeding female with a dark body. Predict the genotypes and phenotypes of the F1 and F2 flies produced by this cross assuming that the body color gene ia a) autosomal or b) X-linked.