Multiple choice

Which of the following are examples of pleiotropy?

  1. Phenylketonuria
  2. Haemophilia
  3. Albinism
  4. Colour blindness
  5. Sickle-cell anaemia

  1. 1, 2 and 3

  2. 1, 3 and 5

  3. 2, 3 and 4

  4. 2, 4 and 5

  5. 3, 4 and 5
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pleiotropy occurs when one gene influences multiple, seemingly unrelated phenotypic traits. Consequently, a mutation in a pleiotropic gene may have an effect on some or all traits simultaneously. Well known examples of pleiotropy include phenylketonuria, albinism and sickle-cell anaemia.

Keep practicing — related questions