The process of formation of gametes (sex cells like sperm and egg) is called gametogenesis.

Here's a breakdown:

* Gametogenesis is a type of cell division that reduces the number of chromosomes in a cell by half, creating haploid gametes.

* There are two types of gametogenesis:

* Spermatogenesis - the formation of sperm cells in males

* Oogenesis - the formation of egg cells in females

Gametogenesis is a crucial process for sexual reproduction, ensuring that the offspring inherit half of their genetic material from each parent.