To use all functions of this page, please activate cookies in your browser.
With an accout for my.bionity.com you can always see everything at a glance – and you can configure your own website and individual newsletter.
- My watch list
- My saved searches
- My saved topics
- My newsletter
An oocyte, ovocyte, or rarely oöcyte, is a female gametocyte or germ cell involved in reproduction. In other words, it is an immature ovum. An oocyte is part the ovary development. The germ cells produce a primordial germ cell (PGC) which becomes an oogonia which marks the start of mitosis. After mitosis stops (due to actions of retinoic acid and the mesenephros) meiosis starts. This stage the oogonia is now an Oocyte (pronounced oh'a (like Noah)-site).
Additional recommended knowledge
The formation of an oocyte is called oocytogenesis, which is a part of oogenesis. Oogenesis results in the formation of both primary oocytes before birth, and of secondary oocytes after it as part of ovulation.
Oocytes are rich in cytoplasm which contains yolk granules to nourish the cell early in development.
During the primary oocyte stage of oogenesis, the nucleus is called a germinal vesicle
The only normal type of secondary oocyte has sex chromosomes 23,X (where sperm can be 23,X or 23,Y).
The space wherein an ovum or immature ovum is located is the cell-nest.
William K. Purves, Gordon H. Orians, David Sadava, H. Craig Heller, Craig Heller (2003). Life: The Science of Biology(7th ed.), pp. 823–824
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Oocyte". A list of authors is available in Wikipedia.|