Albinism is a recessive trait. A man and woman who both have normal pigmentation have one child out of three who has albinism (without melanin pigmentation). What are the genotypes of this child's parents?
A) One parent must be homozygous for the recessive allele; the other parent can be homozygous dominant, homozygous recessive, or heterozygous.
B) One parent must be heterozygous; the other parent can be homozygous dominant, homozygous recessive, or heterozygous.
C) Both parents must be heterozygous.
D) One parent must be homozygous dominant; the other parent must be heterozygous.

Question

Quizplus · Accepted Answer

Both parents must be heterozygous (carriers) for the recessive albinism allele in order for their child to have a 25% chance of inheriting two recessive alleles and thus express the trait.

Albinism Is a Recessive Trait