Albinism is an autosomal (not sex-linked) recessive trait. A man and woman are both of normal pigmentation and have one child out of three who is albino (without melanin pigmentation). What are the genotypes of the albino'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.
E) Both parents must be homozygous dominant.

Question

Quizplus · Accepted Answer

Since albinism is an autosomal recessive trait and they have an albino child, both parents must carry one copy of the recessive allele, making them heterozygous.

Albinism Is an Autosomal (Not Sex-Linked) Recessive Trait