In humans, the sex of the child depends on what?
Answer and explanation
Correct answer: On the sex chromosome coming from the father
In the usual human XX–XY system, the mother’s egg carries an X chromosome, whereas the father’s sperm carries either X or Y. Fertilisation by an X-bearing sperm produces XX, generally female; fertilisation by a Y-bearing sperm produces XY, generally male. Thus the paternal sex chromosome determines the chromosomal sex of the child. Option A is correct; food, blood group, and birthplace do not determine it.
Frequently asked questions
What is the correct answer to this question?
On the sex chromosome coming from the father
Why is this the correct answer?
In the usual human XX–XY system, the mother’s egg carries an X chromosome, whereas the father’s sperm carries either X or Y. Fertilisation by an X-bearing sperm produces XX, generally female; fertilisation by a Y-bearing sperm produces XY, generally male. Thus the paternal sex chromosome determines the chromosomal sex of the child. Option A is correct; food, blood group, and birthplace do not determine it.
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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