Question

Chromosome number is halved in gametes to restore the normal number i.e. _____ after fertilization to form a zygote.

Answer 1

1. Meiosis is a type of cell division that results in four daughter cells each having half the number of chromosomes (n) as that of their parent cell.
2. Thus, haploid gametes possess one set of chromosomes.
3. During fertilization, gametes fuse to form a zygote which is diploid i.e. 2n number of chromosomes.

Therefore, the chromosome number is halved in gametes to restore the normal number i.e. 2n after fertilization to form a zygote.