In Drosophila, red eyes and normal wings are dominant features. What offspring can be expected if a homozygous red-eyed female with rudimentary wings is crossed with a white-eyed male with rudimentary wings?
So, A – red eyes, and – white eyes.
B – normal wings, b – rudimentary wings. Therefore, a homozygous red-eyed female with rudimentary wings is designated AAbb, a white-eyed male with rudimentary wings is designated aabb.
Female AAbb interbreeds with male Aabb, we get offspring with 100% genotype Aabb, that is, all flies will be heterozygotes with red eyes and rudimentary wings, there can be no other options.
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