Determination of sex of a child depends upon

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(A) In humans,the sex of a child is determined by the sex chromosomes.Females are homogametic,producing eggs that always contain an $X$ chromosome.Mal

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Nature of sperm

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(A) In humans,the sex of a child is determined by the sex chromosomes.Females are homogametic,producing eggs that always contain an $X$ chromosome.Males are heterogametic,producing two types of sperm: those carrying an $X$ chromosome and those carrying a $Y$ chromosome.If a sperm carrying an $X$ chromosome fertilizes the egg,the resulting zygote will be $XX$ (female).If a sperm carrying a $Y$ chromosome fertilizes the egg,the resulting zygote will be $XY$ (male).Therefore,the sex of the child depends on the nature of the sperm that fertilizes the egg.

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