WAEC Biology 2021 Objective — Question 45
Question 45 of 50 from the West African Examinations Council (WAEC) Biology 2021 Objective paper, with the correct answer and a full explanation.
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45. Which of the following statements about sickle cell anaemia is correct?
- A. It is caused by sex-linked genes
- B. It is more common in males than females
- C. Two sickle cell carrier parents may have a sickling childCorrect
- D. It is caused by recessive genes
Explanation
Sickle cell anaemia is not sex-linked; when both parents are carriers (heterozygous), there is a chance that a child inherits the sickle allele from both, resulting in a sickling (affected) child.
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