The phenotypes and genotypes that result from a cross of Aa and aa (A = normal pigmentation and a = albinism) are

A. phenotypes:all albino; genotypes:50% heterozygous and 50% homozygous recessive.
B. phenotypes:all normal; genotypes:50% heterozygous and 50% homozygous recessive.
C. phenotypes:all albino; genotypes:all homozygous recessive.
D. phenotypes:50% normal and 50% albino; genotypes:50% heterozygous and 50% homozygous recessive.


Answer: D

Anatomy & Physiology

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