In a human pedigree that traces the inheritance of albinism,a filled square represents a
A)male with albinism.
B)female with albinism.
C)heterozygous male.
D)heterozygous female.

Question

Quizplus · Accepted Answer

Albinism is a recessive genetic disorder, which means that an individual must inherit two copies of the mutated gene (one from each parent) to show the trait. Since squares represent males in a pedigree, a filled square indicates an individual who expresses the trait of albinism, which can only happen if he inherits two copies of the mutated gene for albinism. Therefore, the correct answer is A - male with albinism.

In a Human Pedigree That Traces the Inheritance of Albinism,a