Single correct option
Consider the following statements:
1. The sex of a human child is determined by the egg released by the mother.
2. A normal human male has one X and one Y chromosome.
Which of the statements given above is/are correct?
1. The sex of a human child is determined by the egg released by the mother.
2. A normal human male has one X and one Y chromosome.
Which of the statements given above is/are correct?
- A. 1 only
- B. 2 only
- C. Both 1 and 2
- D. Neither 1 nor 2
Show answer and solution
Answer: (B) 2 only
All eggs carry an X chromosome, whereas sperms carry either X or Y. The sex of the child is thus determined by the type of sperm that fertilises the egg (X gives a girl and Y a boy), so statement 1 is wrong. A normal male has XY and a female has XX, so statement 2 is correct.
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