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how is phenylketonuria an example of pleiotropy ? please explain in simple words

how is phenylketonuria an example of pleiotropy ? please explain in simple words
 

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1 Answers

Arun
25750 Points
5 years ago
In humans, an example for pleiotropy is phenylketoneuria. It is caused by mutation in the gene that codes for phenyl alanine  hydroxylase. This manifests itself through phenotypic expression characterised by mental retardation, reduction in hair, skin pigmentation.

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