Question

When Thomas Hunt Morgan crossed his red-eyed F1 generation flies to each other, the F2 generation included both red- and white-eyed flies. Remarkably, all the white-eyed flies were male. What was the explanation for this result?A) The gene involved is on the Y chromosome.B) The gene involved is on the X chromosome.C) The gene involved is on an autosome, but only in males.D) Other male-specific factors influence eye color in flies.

Answer 1

Answer:

B. The gene involve is on the X chromosome

Explanation:

The gene of eye color is located on X chromosomes. These is an example of sex linked genes. Genes located on the X chromosomes are called X- linked genes. Since the males have only one X chromosomes, the gene for white eye when present in male will always be expressed because it does not have an allele to hide or prevent its expression. Thus male flies will be white-eyed.