Why is it scientifically wrong to blame only the mother for the sex of a child?
Answer and explanation
Correct answer: The mother always gives X, while the father can give X or Y
The governing concept is the inheritance of sex chromosomes and the equal genetic contribution of the parents. A human egg normally carries X, while sperm cells are of two types: X-bearing or Y-bearing. The sperm that fertilises the egg therefore determines whether the zygote is XX or XY. Option A is correct. The mother does not provide Y, the father contributes a chromosome, and food does not determine chromosomal sex.
Frequently asked questions
What is the correct answer to this question?
The mother always gives X, while the father can give X or Y
Why is this the correct answer?
The governing concept is the inheritance of sex chromosomes and the equal genetic contribution of the parents. A human egg normally carries X, while sperm cells are of two types: X-bearing or Y-bearing. The sperm that fertilises the egg therefore determines whether the zygote is XX or XY. Option A is correct. The mother does not provide Y, the father contributes a chromosome, and food does not determine chromosomal sex.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
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