zygote definition wikipedia
A zygote (from Greek Î¶ÏÎ³ÏÏÏÏ zygÅtos joined or yoked, from Î¶ÏÎ³Î¿á¿¦Î½ zygoun to join or to yoke), is a eukaryotic cell formed by a fertilization event between two gametes. The zygote's genome is a combination of the DNA in each gamete, and contains all of the genetic information necessary to form a new individual.In multicellular organisms, the zygote is the earliest developmental stage.n human fertilization, two 1n haploid cellsâan ovum (female gamete) and a sperm cell (male gamete)âcombine to form a single 2n diploid cell called the zygote.