How is the sex of the baby determined?

Sex chromosomes of mother

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Sex chromosomes of father

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'X' chromosome of unfertilised egg

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All 23 pairs of chromosomes

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Solution

The correct option is C Sex chromosomes of father
The father is responsible for determining the sex of the child. The mother has two X chromosomes and donates one X chromosome in the gamete. The father has X and Y chromosome and so the gamete can contain X or Y. The male gamete which fuses with the egg is responsible for the sex of the baby.
Thus, the correct answer is option B.

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If the sex chromosomes of a fertilized egg is (XX), the baby is a ___ child.

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