How many pairs of chromosomes are present in human beings? Out of these how many are sex chromosomes ? How many types of sex chromosomes are found in human beings? "The sex of a newborn child is a matter of chance and none of the parents may be considered responsible for it". Draw a flow chart showing determination of sex of a newborn to justify this statement.




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23 pairs of chromosomes are there in ones body.

Out of the 23 pairs of chromosomes , only 1 pair of chromosomes are sex chromosomes.