Parent 1 is red (Cc) and parent 2 is blue (cc). The offspring in the F1 generation are 50% red and 50% blue. Which allele is dominant? Which allele is recessive?
Parents produce the following gametes:
Parent 1: C, c
Parent 2: c, c
The offspring genotypes are:
50% Cc, 50% cc.
If the blue allele was dominant, all the offspring would be blue. However, since the ratio of genotypes is the same as the ratio of phenotypes, the allele C is dominant and the allele c is recessive.
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