PKU is a human disease in which the affected individual is unable to metabolize the amino acid,phenylalanine.Symptoms of this disease include mental retardation,a lack of pigmentation,and black urine.PKU is an example of
A) epistasis.
B) pleiotropy.
C) incomplete dominance.
D) co-dominance.
E) complete dominance.

Question

Quizplus · Accepted Answer

PKU is an example of pleiotropy because it is caused by a mutation in a single gene, but it affects multiple traits, including mental retardation, lack of pigmentation, and abnormal urine color.

PKU Is a Human Disease in Which the Affected Individual