A male child would be born to parents if | vedclass

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(D) In humans,sex determination is based on the sex chromosomes. Females have a pair of $XX$ chromosomes,while males have $XY$ chromosomes. During fer

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Genetic chromosomal constitution of child is $XY$

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(D) In humans,sex determination is based on the sex chromosomes. Females have a pair of $XX$ chromosomes,while males have $XY$ chromosomes. During fertilization,the mother always contributes an $X$ chromosome. If the father contributes an $X$ chromosome,the zygote becomes $XX$ (female). If the father contributes a $Y$ chromosome,the zygote becomes $XY$ (male). Therefore,a male child is born when the genetic chromosomal constitution of the child is $XY$.

$A$ male child would be born to parents if

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