If an albino (aa) mates with a person homozygous for normal pigment (AA),
A) there is a 50% probability that the child will have normal pigmentation.
B) there is a 50% probability that the child will have albinism.
C) there is a 100% probability that the child will have normal pigmentation.
D) there is a 100% probability that the child will have albinism.

Question

Quizplus · Accepted Answer

Albinism is a recessive trait, so an albino individual has the genotype aa. A person with normal pigmentation and homozygous for that trait has the genotype AA. When these two individuals mate, all offspring will receive one A allele from the AA parent and one a allele from the aa parent, resulting in a genotype of Aa for all offspring. This means they will all have normal pigmentation, as the A allele is dominant over the a allele.

If an Albino (Aa) Mates with a Person Homozygous for Normal