6. Additional objective type questions on sex-determination system

Choose the suitable answer for the given questions:

1. 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

(iii) only
(i) and (ii)
(iii) and (iv)
(ii) and (iv)

2. Select the incorrect statement

Reduction in weight of the organism due to starvation is
Frequency of certain genes in a population change over several
Low weight parents can have heavy weight progeny
Traits which are not inherited over generations do not cause

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