Write a brief account on gametogenesis with examples.

Explanation

Gametogenesis is a processes by which diploid or haploid precursor cells undergo cell division and differentiation to form mature haploid gametes. They are two types :
1) Hemogametogenis : In some algae like cladophora the two gametes are so similar in apperance that it is not possible to categorize them into male and female gametes. They are called homogametes and process is called homogametogenesis.
2) Heterogametogensis : In a majority of sexual reproduction organisms the gametes produced are of two morphologically distinct types. In such organisms, the male gamete is called the authorized and the female gamete is called the egg.
Ex : Funaria, Cycas, Pteris.