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Father produces two type of Sperm X and Y ,where as Mother produces only one type of ova i.e. X

If X sperm fertilises the ovum, then sex of the child is Female.

Whereas, if Y sperm fertilises the ovum. then the sex of child is Male.

So in this family. the X sperm fertilises the Ovum, so Sex of the child is Female and family has only Daughter.
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  • Brainly User
It is by chromosomes like male hv XY and female hv XX