Question

A disease called phenylketonuria causes mental retardation, reduces skin pigmentation, and also affects the coloration of urine. What kind of effect is exhibited by the gene responsible for this disease?

Answer 1

pleiotropic


epistatic


polygenic

Answer 2

@paki

Answer 3

@dan815

Answer 4

I'd say A. pleiotropic
Pleiotropy occurs when one gene influences multiple, seemingly unrelated phenotypic traits, an example being phenylketonuria.