A cell formed by the union of two gametes, typically the nucleus of a spermatozoon and an ovum, which develops into an embryo.
From greek zygōtos "joined", from zygon "yoke".
- The fertilized egg is called a zygote.
- The zygote is the first stage of development in the life cycle of a multicellular organism.
- The zygote undergoes a series of cell divisions that eventually form the embryo.
- The zygote is formed when the sperm and egg unite during fertilization.
- The zygote is diploid, it contains half the number of chromosomes from each parent.