So in humans, as well as other organisms, what happens is the sperm cell basically combines with the egg. And the sperm and the egg are both haploid with respect to their chromosome number. And when they combine, they form the diploid zygote. And the diploid zygote eventually grows into the organism, into the human, or into some other animal. Now, what parthenogenesis is is the following. Parthenogenesis is the process by which an unfertilized egg, which is haploid with respect to its chromosome number, develops by itself into the organism.