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

  1. A
    It is controlled by recessive genes
  2. B
    It is not a fatal disease
  3. C
    It provides immunity against malaria
  4. D
    It is controlled by dominant genes

Solution & Step-by-step Explanation

Heterozygous individuals for the sickle-cell trait have RBCs that make it difficult for the malaria parasite (Plasmodium falciparum) to survive, conferring a survival advantage in malaria-endemic regions (heterozygote advantage).

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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

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