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In fruit flies (Drosophila melanogaster) there is a dominant allele for red eyes and a recessive allele for white eyes. These alleles are located on the X chromosome. If a heterozygous red-eyed female is mated with a white-eyed male, what percentage of the offspring are expected to be white-eyed females?

User Sean Beach
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2 Answers

3 votes

Answer:

Step-by-step explanation:

50% of the offspring female population are expected to be white eyed females

User Russia
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3 votes

Answer:

50% of the offspring female population are expected to be white eyed females

Step-by-step explanation:

Since the allele can only be found on the X chromosome, the chances of the offspring developing white eyes, would mostly occur in the females; since the heterozygous female would mate with a white eyed male.

This results to the following below

R- red eyes

w- white eyes

Female - R w X Male- w w

Offspring alleles F1- R w R w w w w w

Therefore, from the cross, we can conclude that the percentage possibility of white eyed females is... 50%.

User Eumiro
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