Question

how is the sex of an new born child genetically in human being

Answer 1

Sex of an new born baby child is genetically in human being as by the sex chromosomes it is determined whether the child is male or a female. If the child it male it will have XY sex chromosomes and if child is girl she would have XX sex chromosomes.

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Answer 2

sex of child depends one only one thing
if the chromosome xand y meats then it will be girl and when the cromosome x and x meats it will be boy.
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