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)Eye color in flies is a multifactorial trait.

Question

Quizplus · Accepted Answer

Thomas Hunt Morgan's observation that all white-eyed flies were male is consistent with the gene for eye color being located on the X chromosome, as males only inherit one X chromosome and therefore only have one copy of the gene. Females inherit two copies of the X chromosome and therefore can have different alleles for the eye color gene, making it less likely for them to express the recessive white-eye trait.

When Thomas Hunt Morgan Crossed His Red-Eyed F1 Generation Flies

When Thomas Hunt Morgan Crossed His Red-Eyed F₁ Generation Flies