Single correct option
Consider the following statements about sex determination in humans:
1. The sex of a child is determined by the chromosome received from the father.
2. A normal human female has one X and one Y chromosome.
Which of the statements given above is/are correct?
1. The sex of a child is determined by the chromosome received from the father.
2. A normal human female 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: (A) 1 only
A mother always passes an X chromosome through the egg, whereas the father's sperm carries either X or Y. A sperm with X gives a girl and with Y gives a boy, so the father's contribution decides the sex. Statement 1 is correct. Normal females are XX and males XY, so statement 2 is wrong.
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