The zygote is a stage of development.
 In the fertilized daughter, DNA is then replicated in the two separate pronuclei derived from the sperm and ovum, making the zygote's chromosome number temporarily 4n diploid
A zygote (from Ancient Greek   (zygts) 'joined, yoked', from   (zygoun) 'to join, to yoke') is a eukaryotic cell formed by a fertilization event between two gametes

