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WAEC Biology 2003 Question 58

Question 58

Mendelian Inheritance

Sickle-cell anaemia has persisted in the human race due to

  1. A.lack of proper medical care for sicklers
  2. B.carriers being more resistant to malaria
  3. C.mosquito vectors
  4. D.wildlife intermediate hosts
Show the answer and explanation

Answer: B (carriers being more resistant to malaria)

Explanation

Carriers (HbAS) resist malaria better, so in malaria areas they survive and pass the sickle gene on to their children.