When Thomas Hunt Morgan crossed 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?
The gene involved is located on the Y chromosome.
The gene involved is located on the X chromosome.
The gene involved is located on an autosome, but only in males.
Other male-specific factors influence eye color in flies.