The process of meiosis produces gametes with genetically non-identical nuclei. These are produced in plants as well as in animals. They fuse to form a zygote.
Gametes are haploid reproductive cells in sexually reproducing organisms that fuse during fertilization. Fertilization produces a diploid cell that undergoes repeated rounds of cell division to produce a new individual.
Types of gametes
There are two types of gametes whose form and function are distinct from one another in many species. In humans and other mammals, for instance, the ovum is much larger than the sperm. The two most common gametes are sperm and ova. These two haploid cells can undergo internal or external fertilization and differ in size, form, and function. Some species produce both sperm and ova within the same organism.