Q. Fruit flies homozygous for the recessive mutation scarlet have bright red eyes because they cannot synthesize brown pigment. Fruit flies homozygous for recessive mutation brown have brownish-purple eyes for the reason that they cannot synthesize red pigment. Fruit flies homozygous for both of these mutations have white eyes as they cannot synthesize either type of pigment. The brown and scarlet mutations assort independently. If fruit flies that are heterozygous for both of these mutations are intercrossed, what sorts of progeny will they create, and in what proportions? Describe how you got the answer.