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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?

A.) RR and Rr
B.) Rr only
C.) RR and rr
D.) RR, Rr, and rr

1 Answer

2 votes
The answer is D.) RR, Rr, and rr
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