Question
Biology Question on Non-Mendelian Genetics
Which one of the following is a genetic disease?
A
Phenylketonuria
B
Blindness
C
Cataract
D
Leprosy
Answer
Phenylketonuria
Explanation
Solution
Phenylketonuria (PKU) is a genetic disorder in which homozygous recessive individual lacks the enzyme phenylalanine hydroxilase needed to change phenylalanine (Amino acid) into tyrosine (Amino acid). Thus biochemical abnormality in PKU is an inability to convert phenylalanine into tyrosine leading to hyperphenyl alaninemia.