What is the primary role of meiosis?

What is the significance of meiosis?

$(1)$ Give scientific reason: Meiosis is important for the maintenance of a specific number of chromosomes from generation to generation.
$(2)$ Give scientific reason: The meiosis process plays an important role in the evolution of species.

Which of the following statements are correct regarding the importance of meiosis?
$(i)$ It increases the genetic variability in the population of organisms from one generation to the next.
$(ii)$ It decreases genetic variability.
$(iii)$ It occurs in all cells of our body.
$(iv)$ It is an important process for evolution.

Which process maintains the stability of the chromosome number in the generation produced by sexual reproduction?

During reproduction,the chromosome number $(2n)$ reduces to half $(n)$ in the gametes,and the original number $(2n)$ is restored in the offspring. What are the processes through which these events take place?