» For other meanings see Zygote (disambiguation). A zygote (from Greek zugōtos ‘joined’, from zugoun ‘to join’) is a cell that's the result of fertilization. That is, two haploid cells—usually an ovum from a female and a sperm cell from a male—merge into a single diploid cell called the zygote (or zygocyte). In mammals, fusion of the sperm with the ovacyte occurs in the Fallopian tube and the resulting diploid zygote becomes embedded in the uterus… (More on Zygote)