Question

Albinism and phenylketonuria are disorders due to

• A. recessive autosomal genes
• B. dominant autosomal genes
• C. recessive sex genes
• D. dominant sex genes

Answer 1

Answer: (A)

Phenylketonuria and albinism are caused due to presence of recessive autosomal genes. Phenylketonuria is due to accumulation of phenylpyruvic acid and causes mental disorders. Albinism is due to absence of melanin pigment and individuals suffering with this disease are incapable of converting dihydroxyphenylalanine into melanin.