Question
Biology Question on Principles of Inheritance and Variation
Sickle cell anaemia has not been eliminated from the African population because :
A
it is controlled by recessive genes
B
it is not a fatal disease
C
it provides immunity against malaria
D
it is controlled by dominant genes
Answer
it provides immunity against malaria
Explanation
Solution
Sickle cell anemia has not been eliminated from the African population because it provides immunity against malaria. Heterozygous carriers of the sickle cell gene have some resistance to malaria, which is common in certain regions of Africa where the disease is prevalent.
Therefore, the correct option is (C): it provides immunity against malaria