In humans, the sex of a child depends on the chromosome coming from whose sperm?
Answer and explanation
Correct answer: Father’s
The mother’s egg normally contributes an X chromosome in every fertilisation. The father produces two types of sperm in roughly equal numbers: X-bearing and Y-bearing. An X sperm joined with the egg forms XX, while a Y sperm forms XY. Thus the chromosome contributed by the father’s sperm determines the usual chromosomal sex combination; option B is correct. This does not imply choice or control by either parent.
Frequently asked questions
What is the correct answer to this question?
Father’s
Why is this the correct answer?
The mother’s egg normally contributes an X chromosome in every fertilisation. The father produces two types of sperm in roughly equal numbers: X-bearing and Y-bearing. An X sperm joined with the egg forms XX, while a Y sperm forms XY. Thus the chromosome contributed by the father’s sperm determines the usual chromosomal sex combination; option B is correct. This does not imply choice or control by either parent.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Heredity and Evolution. Topic: Sex determination.
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