Question

Which of the following describes an instance of pleiotropy?

A. Haemophilia
B. Thalassemia
C. Sickle cell anemia
D. Colour blindness

Answer 1

C. Sickle cell anemia.

Step-by-step explanation:

Sickle cell anemia is an instance of pleiotropy because a single gene mutation affects multiple traits or phenotypes. The mutation in the gene that codes for hemoglobin results in abnormal red blood cells, leading to various symptoms such as anemia, pain crises, and organ damage. Thus, a single gene alteration has multiple effects or manifestations in different body systems or traits.