Zygote

Definition

A zygote is the initial cell formed when two gamete cells (sperm and egg) are joined through the process of fertilization. It contains all the genetic information necessary to form a new individual.

Related terms

Gamete: A mature haploid male or female germ cell which is able to unite with another of the opposite sex in sexual reproduction to form a zygote.

Fertilization:

The process by which male and female gametes are fused together, initiating the development of a new organism.

Embryo:

An early stage of development in multicellular organisms that follows the zygote stage and precedes birth or hatching