Sentences with phrase «oocyte cytoplasm»
Then, the sperm DNA is transferred inside the oocyte cytoplasm from the 50th minutes.
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Indeed, the ability to clone animals, such as Dolly the sheep, by fusion of an adult cell to an enucleated oocyte demonstrates that the epigenetic programming responsible for maintaining an adult cell in a stable state can be erased by factors present in the cytoplasm of the oocyte.
When a sperm cell meets an egg cell (the oocyte), it burrows through the thick outer rind surrounding the egg (the zona pellucida), enters the internal cytoplasm of the egg (the ooplasm), and locomotes its male DNA — half of the typical number of chromosomes — to the female half within about three to four hours.
Oocytes, unfertilized eggs, have an exceptionally large cytoplasm containing RNA and protein that drives the early cleavage divisions and reprograms the male pronucleus to support early development.