Multiple choice

In a cross between red-eyed female dragonfly and a white-eyed male dragonfly what percent of the male progenies will have white eyes? (White eyes are X-linked recessive)

  1. 75%

  2. 50%

  3. 25%

  4. 0%
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The pure breed female is homozygous with the normal X chromosome and the white-eyed male is hemizygous for the X chromosome with a white eye mutation. Therefore, all male and female progenies are red-eyed.

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