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

question 42

Multiple Choice

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.
• E) Other female-specific factors influence eye color in flies.