Question

The best example of pleiotrpy is

• A. Skin colour
• B. Phenylketonuriya
• C. Colour blindness
• D. ABO Blood group

Answer 1

Answer:

B. Phenylketonuriya

• Phenylketonuria is an example of pleiotropy. It is a metabolic disorder, which occurs due to a defective gene for the enzyme phenylalanine hydroxylase. It causes multiple phenotypic expressions.