Question

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

• A. It provides immunity against Malaria
• B. It is controlled by dominant genes
• C. It is controlled by recessive genes
• D. It is not a fatal disease

Answer 1

The correct option is A It provides immunity against Malaria

• Sickle cell anaemia is a blood disorder inherited from parents in which the Red blood cells become rigid and sickle-shaped which may lead to different health issues such as anaemia, swelling in the hands and feet, bacterial infections and stroke.
  
• It is an autosomal disorder linked to the recessive alleles.
• It has not been eliminated from the African population because it provides immunity against malaria.
• Falciparum malaria is the most prevalent malaria in the African continent which is responsible for deaths in this region.
• People with sickle cell anaemia are less vulnerable to falciparum malaria.
• So, the correct answer is 'It provides immunity against malaria'.