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In fruit flies, the gene for red eyes (R) is dominant and the gene for sepia eyes (r) is recessive. What are the possible combinations of genes in the offspring of two red-eyed heterozygous flies (Rr)?
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In fruit flies, the gene for red eyes (R) is dominant and the gene for sepia eyes (r) is recessive. What are the possible combinations of genes in the offspring of two red-eyed heterozygous flies (Rr)?

User Roberto Linares
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1 Answer

3 votes
The possible combinations are as follows

R r
R RR Rr
r Rr rr

so you would have a ratio of 1RR : 2Rr : 1rr


User Marek Roj
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