Crossing white- eyed male Drosophila to red- eyed females produces all red- eyed F₁ offspring, but the one half of the males in the F₂ generation are white- eyed. What concept best explains this observation of eye color?

Question

Quizplus · Accepted Answer

The observation that all F1 offspring have red eyes (indicating the trait is dominant) but half of the F2 males have white eyes suggests that the gene for eye color is located on the X chromosome. Since males inherit only one X chromosome (from their mothers), if it carries the white-eye allele, they will express the trait. This pattern of inheritance is consistent with X-linked inheritance.

Crossing White- Eyed Male Drosophila to Red- Eyed Females Produces