The belief that the mother is completely responsible for the sex of the child is wrong, because the child

Gets sex determining chromosome only from the mother

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Develops in the body of the mother

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Gets one sex chromosome from the mother and the other from the father

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Gets sex determining chromosome only from the father

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Solution

The correct option is D Gets sex determining chromosome only from the father
The male sex gametes possess X and Y chromosomes, and the female sex gametes possess two X chromosomes. The sex of the child depends on the gamete of the male which fuses with the female. If the X gamete fuses, the zygote formed has the XX chromosomes which form a girl child whereas, the male child is formed by the zygote with the XY chromosome content. So, the correct answer is option D.

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A boy child is born when it inherits …………..chromosome from father and ………….. chromosome from mother.

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