In fruit flies, the gene for white eyes is sex-linked recessive. (R) is red and (r) is white. Cross a homozygous red-eyed female with a white-eyed male. Which of the following statements is true?

Question

Cecelia Gates

Biology

30 May, 15:30

In fruit flies, the gene for white eyes is sex-linked recessive. (R) is red and (r) is white. Cross a homozygous red-eyed female with a white-eyed male. Which of the following statements is true?

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Answers (1)

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Kailyn · Answer 1

The result would be 50% red-eyed female and 50% red-eyed male

Explanation:

Crossing a homozygous dominant with a homozygous recessive would result in a 100% chance that every offspring is heterozygous. The cross result would look like this:

Rr Rr Rr Rr

Edit: reread and saw sex-linked, sorry.

The cross would look like this.

Xr Y

XR XRXr XRY

XR XRXr XRY

The result would be 50% red-eyed female and 50% red-eyed male