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Dictionary » O » Oocyte

Oocyte

Definition

noun, plural: oocytes

(1) A female gametocyte.

(2) A developing female germ cell.


Supplement

The oocyte is an immature female sex cell. It starts off as an oogonium by the process of oocytogenesis, and matures to give rise to a fully mature ovum or egg cell and ootid (by ootidogenesis).

In humans, the oocytes are of two types:

The counterpart of oocyte in males is spermatocyte.


Word origin: From Ancient Greek ᾠο-, combining form of ᾠόν (egg) + New Latin cyta from Ancient Greek κύτος kutos, (vessel, jar).

Variant: ovocyte, ocyte

Compare: spermatocyte

See also: meiosis, ootidogenesis, oocytogenesis

Related terms:


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How many chromosomes do humans have ?!

Just wanted to add that chloroplast in plant cells also have a DNA component in their genetic makeup. Mitochondrial DNA is also from the maternal oocyte, as the sperm's mitochondria do not enter the oocyte (just the nucleus does) upon fertilization.

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by kolean
Thu Oct 01, 2009 10:49 pm
 
Forum: Genetics
Topic: How many chromosomes do humans have ?!
Replies: 3
Views: 58

Help with Xenotransplantation please.

... the egg cell before fertilisation. Also the plasmid/gene construct is usually propagated in a cell culture and before being inserted into the pig oocyte. The transgenic pig embryo is then planted into the womb of a pig, where it grows and develops into a piggy, which then develops the traits that ...

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by biohazard
Thu Jul 23, 2009 12:17 pm
 
Forum: Genetics
Topic: Help with Xenotransplantation please.
Replies: 1
Views: 202

Questions about single pig oocyte RT-PCR.

My lysis buffer: NP40 2ul RNase Inhibitor 5ul dNTP 10ul oligodT 10ul DTT 10ul 5*RT buffer 40ul Add H2O to 100ul， Take 5ul to eppendorf tube. hyaluronidase to remove cumulus cells. The amplification program for the reverse transcription step was as follows: 70°C for 10 min, ice 2min ,MMLV ,42°C for 5...

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by dragonwang
Mon Jun 23, 2008 3:48 am
 
Forum: Molecular Biology
Topic: Questions about single pig oocyte RT-PCR.
Replies: 1
Views: 598

Re: What kills (and what saves) a corpus luteum?

... it. It it's not fertilized within 10-14 days then the uterus will in turn no longer need progesterone and estrogen to ready for pregnancy. If the oocyte is fertilized and does becomes a zygote then the corpus luteum will continue to secrete progesterone and estrogen for 12 weeks in order soften ...

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by cspacy
Sat May 03, 2008 4:40 pm
 
Forum: Human Biology
Topic: What kills (and what saves) a corpus luteum?
Replies: 3
Views: 1691

Re: LH

... been already made) Menstral cycle: Day 1-14 = LH production increases slowly (effect of FSH production cauising development of thecal cells of oocyte) Day 14 ('ovulation') = LH surge (positive feedback due to oestrogen) Day 14-28 = High progesterone -> Inhibition of LH [NB. Day 28 is menstration] ...

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by Revenged
Tue Jul 03, 2007 11:01 pm
 
Forum: General Discussion
Topic: LH
Replies: 7
Views: 1422
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