Refer to the given family tree and answer the question

If A= normal allele, a = albino allele, then genotypes of father and mother are respectively

Options

A. Aa and Aa
B. AA and Aa
C. Aa and AA
D. Aa and aa

Answer

A

Explanation

Albinism is hereditary lack of pigmentation in an organism. It is an autosomal recessive disorder. Albino humans lack dark pigment melanin in their skin, hair or eyes. The allele responsible is recessive to allele for normal pigmentation. Father's and mother's genotype should be Aa. They both are carriers of the disease

The chances of this couple'f fifth child being an albino are 1 in 4.