WAEC Biology 2022 Objective — Question 48
Question 48 of 50 from the West African Examinations Council (WAEC) Biology 2022 Objective paper, with the correct answer and a full explanation.
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When two carriers of sickle cell anaemia produce an offspring, the probability of the offspring being a sickler is
- A. ¾
- B. ¼Correct
- C. ½
- D. ⅔
Explanation
Two carriers (heterozygous, AS×AS) have offspring in the ratio 1 AA : 2 AS : 1 SS, so the probability of a sickler (SS) offspring is ¼.
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