(a) Ovary - It is the female part of the plant which has ovules. It is a diploid (2n) structure. (b) Anther - It is the male part of the flower and contains pollen grain. It is a  diploid structure (2n). (c) Egg - Ovules are known as egg. It is female gamete present  in the ovary. It is a haploid structure (n). (d) Pollen - Pollens are male gamete. It is a haploid (n) gamete. (e) Male gamete - Pollens are male gamete. It is a haploid (n) gamete. (f) Zygote - It is formed by the fusion of male and female gamete. It is a diploid structure (2n).