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Questions  

The disease in which affected individual lacks an enzyme that converts the amino acid phenylalanine into tyrosine is an example of:

a
Pleiotropy
b
Co-dominance
c
Incomplete dominance
d
Duplicate gene interaction

detailed solution

Correct option is A

Phenylketonuria is an example for single gene mutation influencing more than one phenotypes (pleiotropic gene) such as reduction in hair, mental retardation and reduction in skin pigmentation.

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