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The number of pair (s) of sex chromosomes in the zygote of humans is 
(a) one             (b) two 
(c) three           (d) four

Answers (1)

best_answer

Answer:(a)

Solution:

The number of sex chromosomes in the zygote of humans is one pair. It is not always a perfect pair. In females, it is perfect with two X-chromosomes. However, in males, there is one X-chromosome and one Y-chromosome.

Therefore, option (a) is correct.

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