Question

A normal appearing couple is found to be heterozygous recessive for albinism. Both have the genotype Aa. The gene responsible for albinism is recessive to the normal pigment-producing gene. What are the chances of their children being albino?

Answer 1

To determine the probabilities that the child will have albinism, what you can do is simply find the probabilities of each parent providing the recessive allele for pigment production, which is 1/2.

Multiply them together to obtain the genotype of the child with albinism, so it would be 1/2 • 1/2 = 1/4.

The probability would be 25%.

Answer 2

The probability is 25%

Step-by-step explanation:

Mother: Aa

Father: Aa

Aa x Aa = AA - Aa - aA - aa

The recessive homozygous aa is the one which produces albinism, so then, there are 4 possible genotypes andthe only one that can produce albinism, gives us a probability of 25%