Question

Pull out a piece of paper and pencil because this question will take some thought. First, work out the predicted offspring of a mating between a white-eyed female and a red-eyed male Drosophila. Next, work out the predicted offspring of a heterozygous red-eyed female and a white-eyed male. What is the result of both crosses?

Answer 1

In the first case, all females will have red eyes and all males will have white eyes.

In the second case, there will be equal numbers of white and red eyes.