Biologymedium · Past Paper

In a dihybrid cross between RRYY (Round Yellow) and rryy (Wrinkled Green), what is the phenotype of the F1 offspring?

AWrinkled Green
BRound Green
CWrinkled Yellow
DRound Yellow

✓ Correct Answer: DRound Yellow

Round and Yellow are dominant traits, so the F1 (RrYy) will appear Round and Yellow.

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