Question

New species may be formed if

1. DNA undergoes significant changes in germ cells
2. chromosome number changes in the gamete
3. there is no change in the genetic material
4. mating does not take place

Options

• (i) and (ii)

• (i) and (iii)

• (ii), (iii) and (iv)

• (i), (ii) and (iii)

Answer 1

(i) and (ii)

Explanation - 

Gametes or sex cells are the cells involved in sexual reproduction. These gametes fuse to form a zygote which develops into a new organism. So, any change in the DNA or chromosome numbers of the gametes will be transmitted to the new organism. If this new organism with inherited changes in DNA or chromosome number may not reproduce with the existing members, this will be considered a new species.