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

question 28

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.

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