WAEC Biology 2021 Objective — Question 46
Question 46 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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46. In humans, pointed eyebrows (B) is a dominant trait over smooth eyebrows (b). A student and the mother have smooth eyebrows while the father has pointed eyebrows. What is the genotype of the father?
- A. BB
- B. BbCorrect
- C. bb
- D. BBbb
Explanation
Since the child (student) has smooth eyebrows (bb), each parent must carry a recessive 'b' allele. Since the father shows pointed eyebrows (dominant), his genotype must be heterozygous, Bb.
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