What determines the sex of the embryo?

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Question

(A) In humans,the sex of the embryo is determined by the type of sperm that fertilizes the ovum. Females produce ova that always contain an $X$ chromo

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The $X$ or $Y$ chromosome present in the sperm

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(A) In humans,the sex of the embryo is determined by the type of sperm that fertilizes the ovum. Females produce ova that always contain an $X$ chromosome. Males produce two types of sperm: those containing an $X$ chromosome and those containing a $Y$ chromosome. If a sperm carrying an $X$ chromosome fertilizes the ovum,the resulting zygote will be $XX$ (female). If a sperm carrying a $Y$ chromosome fertilizes the ovum,the resulting zygote will be $XY$ (male). Therefore,the sex of the embryo is determined by the $X$ or $Y$ chromosome present in the sperm.

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