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Question

A new born child has an XY pair of chromosomes. Will it be a baby boy or a baby girl?

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Solution

A baby’s sex is determined at the time of conception. When the baby is conceived, a chromosome from the sperm cell, either X or Y, fuses with the X chromosome in the egg cell, determining whether the baby will be female (XX) or male (XY). To be female, one needs to be (XX), whereas to be a male, (XY) is needed.

So, the child will be baby boy.


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