Question

Albinism is known to be due to an autosomal recessive mutationThe first child of a couple with normal skin pigmentation was an albino,What is the probability that their second child will also be an albino? (1)50% (2)75% (3)100% (4)25%

Answer 1

Answer:

25% chance

Explanation:

there would be a 25% chance that their second child would be an albino.

because albinism is an autosomal recessive mutation in a persons genes one parent would have to have one normal gene and one albino gene.

there are 4 outcomes:

1) The child has no albino gene (has normal skin pigmentation)

2) The child has one albino gene from the mother  ( only one gene is a recessive gene so it would not show meaning the child would have normal skin pigmentation)

3) The child has one albino gene from the father (only one gene is a recessive gene so it would not show meaning the child would have normal skin pigmentation)

4) The child has two albino genes (the child would be an albino)