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

question 4

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)Eye color in flies is a multifactorial trait.

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