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29 December, 22:52

In fruit flies, the gene for red eyes (r is dominant and the gene for sepia eyes (r is recessive. if a red-eyed heterozygous fly (rr mates with a sepia-eyed homozygous fly (rr, what are the possible genotypes of their offspring? (hint: you many want to complete a punnett square.

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  1. 29 December, 23:09
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    The answer is Rr and rr.

    R - dominant allele for red eyes

    r - recessive allele for sepia eyes

    If a red-eyed heterozygous fly Rr mates with a sepia-eyed homozygous fly rr, the possible genotypes of the offspring are Rr (heterozygotes) and rr (recessive homozygotes).

    Parents: Rr x rr

    Offspring: Rr Rr rr rr

    Thus, half of the offspring will have genotype RR and will have red eyes while half of the offspring will have genotype rr and will have sepia eyes.
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Home » Biology » In fruit flies, the gene for red eyes (r is dominant and the gene for sepia eyes (r is recessive. if a red-eyed heterozygous fly (rr mates with a sepia-eyed homozygous fly (rr, what are the possible genotypes of their offspring?
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