HEREDITY
SEX LINKAGE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the father’s blood group
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the father’s chromosomes
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the mother’s blood group
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the mother’s chromosomes
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Detailed explanation-1: -That’s with the assumption, though, that the man’s sperm carries equal numbers of X and Y chromosomes. 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.
Detailed explanation-2: -In the XY sex-determination system, the female-provided ovum contributes an X chromosome and the male-provided sperm contributes either an X chromosome or a Y chromosome, resulting in female (XX) or male (XY) offspring, respectively. Therefore it is said that father determines the sex of the child.
Detailed explanation-3: -The father has one X chromosome and one Y chromosome, can give either his X or Y chromosome. The egg (from the mother) already contains an X chromosome. Therefore the sex of a baby is determined by the X or Y chromosome of the sperm cell from the father.