Question

9. Explain why the sex of a child cannot
be determined by the mother's
chromosomes.​

Answer 1

1. Male will have 2 sex chromosomes ie XY and female will have XX as their sex chromosomes.
2. Thus male can donate either X or Y and female will donate only X at the time of gamete formation.
3. Now if, X chromosome is given by male and X from female - it will form female and if male donates Y chromosome and female gives X then it will be male (as XY is male and XX is female).
4. Thus we can say that sex determining chromosome is given by males hence they are responsible for sex of the children.
5. The sex of the children is determined by what they inherit from their father and not their mother"

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