Here's why:

* Gametes are reproductive cells that fuse during fertilization to form a zygote, the first cell of a new organism.

* In humans, the male gamete is called a sperm cell, and the female gamete is called an egg cell (or ovum).

* Gametes are specialized because they contain only half the number of chromosomes of a normal body cell (somatic cell). This is essential for maintaining the correct chromosome number in offspring.

Let me know if you'd like to learn more about gametes or the process of fertilization!