Question

If the white-eye trait were Y-linked dominant, rather than X-linked recessive, what result would you expect when crossing a red-eyed female with a white-eyed male?

Answer 1

In the hypothetical case of a Y-linked dominant white-eye trait, all male offspring of a red-eyed female and a white-eyed male would have white eyes, and all female offspring would have red eyes.

Step-by-step explanation:

If the white-eye trait were Y-linked dominant instead of X-linked recessive, then all sons of a red-eyed female (having only X chromosomes with the red-eye allele) and a white-eyed male (with the white-eye allele on his Y chromosome) would inherit their father's Y chromosome and therefore have white eyes. Daughters, on the other hand, would inherit an X chromosome from the mother and not the Y chromosome from the father, so they would show the red-eye trait. Therefore, all male offspring would exhibit white eyes, while all female offspring would exhibit red eyes.