List the types of pre-fertilization events and provide information about gametogenesis.

(N/A) Pre-fertilization events are the processes that occur before the fusion of gametes. These include two main events:
$1$. Gametogenesis: The process of formation of male and female gametes.
$2$. Gamete transfer: The process of bringing the male and female gametes together for fertilization.
Gametogenesis involves the formation of haploid cells $(n)$ from diploid parent cells $(2n)$ through meiosis. In many organisms,the two gametes produced are morphologically distinct types (heterogametes). The male gamete is called antherozoid or sperm,and the female gamete is called egg or ovum. In some algae,the two gametes are so similar in appearance that it is not possible to categorize them into male and female types; these are called homogametes (isogametes).