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

question 54

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

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