試題詳解

37. 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, and only in males.
(D) There are other male-specific factors that may influence eye color in flies.