Albinism Is a Recessive Condition Resulting from the Inability to Produce

Essay

Albinism is a recessive condition resulting from the inability to produce the dark pigment melanin in skin and hair. A man and woman with normal skin pigmentation want to have two children. The man has one parent with albinism; the woman has parents with normal pigmentation but a brother with albinism.
a. What is the probability that at least one child will be have albinism?
b. What is the probability of both children having normal pigmentation?