Question

What offspring would result from a cross of a homozygous red-eyed female fruit fly and a vermilion-eyed male fruit fly? How might the vermilion-eyed male offspring be produced?

Answer 1

When a homozygous red-eyed female fruit fly is crossed with a vermilion-eyed male fruit fly, all the offspring will have red eyes. Vermilion-eyed male offspring can be produced by mating a red-eyed female fruit fly with a white-eyed male fruit fly.

Step-by-step explanation:

When a homozygous red-eyed female fruit fly is crossed with a vermilion-eyed male fruit fly, the offspring will all have red eyes. This is because the allele for red eye color is dominant over the allele for vermilion eye color. The vermilion-eyed male offspring can be produced by mating a red-eyed female fruit fly with a white-eyed male fruit fly. In this cross, the male offspring will inherit the white-eye allele from the father and the red-eye allele from the mother, resulting in vermilion eye color.