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In human males, all the chromosomes are paired perfectly except one. This/these unpaired chromosome is/are
(i)large chromosome
(ii) small chromosome
(iii) Y-chromosome
(iv) X-chromosome
a)(iii)and (ii)
b)only
c)(iii)and (iv)
d)(ii) and (iv)

Vinay

Solution: Due to the half size of the Y chromosome, they are sex-determining chromosomes that are not properly paired. So, the correct answer is (c) (iii) and (iv).