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How is the sex of a new born determined in humans?

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Solution:
Exchange of genetic material takes place as genes of two parents are involved and both the genetic material are combined to form new genetic output.
Humans have two sex chromosomes, X and Y.
In females, two X chromosomes are present, making it a perfect pair.
But in males, one is a normal-sized X-chromosome while other is a short Y-chromosome.
In humans, sex of the child is determined by chromosome inherited by the father.
If the zygote inherits X chromosome, the zygote will develop into a female.
If the zygote inherits Y chromosome, the zygote will develop into a male.
So women are XX, while men are XY


 

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