Question

Gametes are always haploid, though the parent body may be haploid or diploid.How is it achieved in both kinds of organisms?

Answer 1

When the parent body is haploid then they gametes are formed by mitosis and after fertilisation the zygote undergoes meiosis to achieve the ploidy level of N like that of parent body.

But when the parent body is diploid . The gametes are formed by meiosis and fertilisation restores the ploidy level of 2n like that of parents.

Hope it helps you.