Principles of Inheritance and Variation Question 168

168. Sickle cell anaemia has not been eliminated from the African population because

[2006]

(a) it is not a fatal disease

(b) it provides immunity against malaria

(c) it is controlled by dominant genes

(d) it is controlled by recessive genes

Show Answer

Answer : b

Hints & Solution

(b) In sickle cell anaemia, RBCs become sickle shaped which are not supportive for the growth of malarial parasite Plasmodium so it provides immunity against malaria disease.