Post-UTME Biology 2019 Objective — Question 11
Question 11 of 20 from the Post-UTME Screening (Post-UTME) Biology 2019 Objective paper, with the correct answer and a full explanation.
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A couple had nine children who are all girls. Which of the following statements is the best explanation?
- A. The man's sperm are weak
- B. Woman's eggs are too strong
- C. The X component of the man's sex chromosome was always involvedCorrect
- D. The Y component of the man's sex chromosome was always involved
Explanation
Since the father determines the sex of the child (X-bearing sperm produces a girl, Y-bearing sperm produces a boy), nine girls in a row means the X-bearing sperm was consistently involved in fertilization.
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