Albinism is an autosomal (not sex-linked)recessive trait.A man and woman are both of normal pigmentation,but both have one parent who is albino (without melanin pigmentation).What is the probability that their first child will be an albino?

Question

Quizplus · Accepted Answer

Both parents have one copy of the albino gene (since they each have one albino parent), so they are both carriers of the trait. When they have a child, each parent has a 1/2 chance of passing on their copy of the albino gene. Thus, the probability of both parents passing on the albino gene is 1/2 x 1/2 = 1/4. This means there is a 1/4 chance that their first child will inherit two copies of the albino gene and be albino.

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