Objective To investigate the relationship between the first polar body morphology of oocyte and the zygote morphology in pronucleus stage, embryo quality in cleavage stage.
When the membranes of the two pronuclei rupture, chromosomes go flying, and boom, you officially have a diploid zygote, which almost immediately starts mitosis.
On the inside, the fallopian tubes have smooth muscle with an inner lining that has ciliated cells that slowly sweep the secondary oocyte or zygote towards the uterus.
This specialization makes DNA from non-sex cells particularly unsuited for cloning purposes because those tags and tangles make it hard for the clone zygote to divide.