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In fruit flies, the gene for red eyes (R) is dominant and the gene for sepia eyes (r) is recessive. If two red-eyed heterozygous flies (Rr) mate together, what are the possible genotypes of their offspring? (Hint: You many want to complete a Punnett square.)
Answer
Rr only
RR and Rr
RR and rr
RR, Rr, and rr

Question

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In fruit flies, the gene for red eyes (R) is dominant and the gene for sepia eyes (r) is recessive. If two red-eyed heterozygous flies (Rr) mate together, what are the possible genotypes of their offspring? (Hint: You many want to complete a Punnett square.)
Answer
		Rr only
		RR and Rr
		RR and rr
		RR, Rr, and rr

anonymous · Answer

RR, Rr, and rr

anonymous · Answer

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RR, Rr, Rr, rr. 75% will have red eyes, 25% will have sepia eyes.