Zoology - Principles of Inheritance and Variation Question with Solution | TestHub

Phenylketonuria is an autosomal recessive disorder in which non-formation of enzyme phenylalanine hydroxylase results in the accumulation of phenylalanine. This gets converted to phenylpyruvate which gets accumulated in CNS and results in mental retardation. It also shows multiple phenotypic effects; this is also an example of pleiotropy.