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Question : The sex of the new born child is a matter of chance and neither of the parents may be considered responsible for it.What would be the possible fusion of gametes to determine the sex of the child? |
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Answer» SOLUTION :Out of 23 pairs of chromosomes, 22 pairs are autosomes and ONE pair (`23^(rd)` pair) is the sex chromosome. The female gametes or the EGGS formed are similar in their chromosome type [22x+XX]. So human females are homogametic. The male gametes or sperms produced are of two types. They are produced in EQUAL proportions. The sperm bearing [22+X] chromosomes and the sperm bearing (22+Y) chromosomes. So human males are called heterogametic. It is a chance, as to which CATEGORY of sperm fuses with the egg. If the egg [X] is fused by the X-bearing sperm an [XX] individual (female) is produced. If the egg [X] is fused by the Y-bearing sperm an [XY] individual (male) is produced. The sperm produced by the father, determines the sex of the child. The mother is not responsible in determining the sex of the child.
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