1. Gametogenic Meiosis: The meiosis that occurs during the formation of gametes is called gametogenic meiosis. It is also called terminal meiosis. It occurs before fertilization. Spermatozoa are formed from mother cells to sperm and ovum from mother cells to ovum.
2. Zygogenic Meiosis: The meiosis that occurs in the zygote of an organism is called zygogenic meiosis. It occurs in thallophyta plant algae and fungi. It occurs after fertilization.
3. Sporogenic Meiosis: The meiosis that occurs during the formation of spores in plants is called sporogenic meiosis. It occurs in mosses and ferns. Microspores are produced inside the anther and megaspores inside the ovary.