THE MOLECULAR BASIS OF INHERITANCE
THE HUMAN GENOME
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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father
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mother
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Detailed explanation-1: -A man’s X and a woman’s X combine to become a girl, and a man’s Y combines with a woman’s X to become a boy. But if the sperm don’t have equal Xs and Ys, or if other genetic factors are at play, it can affect the sex ratio.
Detailed explanation-2: -Almost everyone has around a 50% chance of having a boy and a 50% chance of having a girl. What we can say is that dad’s sperm determines whether a baby will be born as a boy or a girl. About half of his sperm will make a boy and half a girl. The sex of the baby depends on which sperm gets to the egg first.
Detailed explanation-3: -Whichever chromosome the sperm that fertilizes the egg has is what determines whether a baby will have male or female sex chromosomes. Of course, you must have both an egg and sperm to make a baby, but the sperm is the determining factor regarding biological sex.