How many X chromosomes can be found in the cells of the body of (i) a boy, and (ii) a girl.
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girls have 2 X chromosomes and boy has 1 X chromosome
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Answer:
(i) A boy has only one X chromosome.
(ii) A girl has two X chromosomes (one pair).
Explanation:
In humans, there are total 23 pairs of chromosomes, generally known as XY type. Out of 23 pair of chromosomes, 22 pairs are exactly the same in both girls and boys called the autosomes and one pair is sex chromosomes. Sex determination is recognized by sex chromosomes. In girl, a pair of X-chromosome is present while a boy has one X and one Y chromosome.
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