Question

In fruit flies (Drosophila melanogaster) there is a dominant allele for red eyes and a recessive allele for white eyes. These alleles are located on the X chromosome. If a heterozygous red-eyed female is mated with a white-eyed male, what percentage of the offspring are expected to be white-eyed females?

Answer 1

Answer:

50% of the offspring female population are expected to be white eyed females

Explanation:

Since the allele can only be found on the X chromosome, the chances of the offspring developing white eyes, would mostly occur in the females; since the heterozygous female would mate with a white eyed male.

This results to the following below

R- red eyes

w- white eyes

Female - R w            X             Male- w w

Offspring alleles F1-   R w   R w   w w   w w

Therefore, from the cross, we can conclude that the percentage possibility of white eyed females is... 50%.