The genotypes and phenotypes that result from the cross of Aa and Aa (A = normal pigmentation and a = albinism) are
A. phenotypes:25% normal and 75% albino; genotypes:25% homozygous dominant and 50% heterozygous and 25% homozygous recessive.
B. phenotypes:50% normal and 50% albino; genotypes:all homozygous recessive.
C. phenotypes:75% normal and 25% albino; genotypes:25% homozygous dominant and 50% heterozygous and 25% homozygous recessive.
D. phenotypes:50% normal and 50% albino; genotypes:50% homozygous recessive and 50% homozygous dominant.
Answer: C
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