Gametes = sex cells

Gametes are the sex cells that fuse together during fertilisation in sexual reproduction. Female gametes may be called ova or eggs. Male gametes are sperm or pollen.

A sperm whale and an egg take on a goat at a game of cards. They love gambling and place an opening gambit (gamete).

NOTE:

The whale has pulled on (pollen) mitts and the egg is oval (ova) shaped.

Animal gametes = Egg cells (ova) and sperm

Plant gametes = Egg and pollen

A gamete (sex cell) is a reproductive cell of an animal or plant. 

In animals, female gametes are called ova or egg cells and male gametes are called sperm. Ova and sperm are haploid cells. During fertilization a sperm and ovum fuse to form a zygote and becomes a diploid cell. 

Note:

1. Ovum is singular, ova is plural.

2. Haploid refers to any cell that has half the chromosomes and for humans this is 23 chromosomes. 

3. Diploid refers to any cell that has a full set of chromosomes and for humans this is 46 chromosomes. 

In plants, female gametes are called egg cells (found within the plant ovary) and the male gametes are called pollen. The pollen grains and egg cells are haploid cells. During fertilization a pollen grain and egg cell form a zygote and becomes a diploid cell.