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  • New species may be formed if  (i) DNA undergoes significant changes in germ cells  (ii) chromosome number changes in the gamete  (iii) there is no change in the genetic material  (iv) mating does not take place  (a) (i) and (ii) (b) (i) and (iii)

New species may be formed if 
(i) DNA undergoes significant changes in germ cells 
(ii) chromosome number changes in the gamete 
(iii) there is no change in the genetic material 
(iv) mating does not take place 

(a) (i) and (ii)

(b) (i) and (iii) 

(c) (ii), (iii) and (iv)

(d) (i), (ii) and (iii)

Answers (1)

(i) If DNA undergoes a significant change in germ cells, new species may be formed. These changes in DNA will be inherited by the germ cells, which passes to the next generation and will be inherited by the subsequent generations.
(ii) chromosome number changes in the gamete lead to a change in the gene pool and causes variation.
(iii) If there is no change in the genetic material, new species will not be formed.
(iv) If mating does not take place, new species will not be formed

Therefore, option (a) is correct.

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infoexpert26

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