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Pronucleus

pronucleus

(Science: molecular biology) haploid nucleus resulting from meiosis.

In animals the female pronucleus is the nucleus of the ovum before fusion with the male pronucleus. The male pronucleus is the sperm nucleus after it has entered the ovum at fertilization but before fusion with the female pronucleus.

In plants the pronuclei are the two male nuclei found in the pollen tube.


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Question on Chromatids

I like to use the words paternal genome and maternal genome. Even though the genomes are inside the oocyte, they are still seperated and called pronucleuses (Mmm....spelling? perhaps I should say -male pronucleus and female pronucleus). They are still being 'worked on' inside their own pronucleus, ...

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by kolean
Tue Dec 21, 2010 3:04 pm
 
Forum: Cell Biology
Topic: Question on Chromatids
Replies: 1
Views: 2199

about ZZW triploid female silkworm,Bombyx mori

... treated with hot water(46 centigrade,18min) immediately after oviposition(0~10min).this hot-water treatment causes the fusion of an ameiotic femal pronucleus,2n(ZW),with a male pronucleus n(Z). but I have some question.I think the oocyte is haploid,but why it is the 2n(ZW). the oocyte should be ...

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by mloonjin
Wed Sep 13, 2006 12:21 pm
 
Forum: Molecular Biology
Topic: about ZZW triploid female silkworm,Bombyx mori
Replies: 1
Views: 1668

silkworm,Bombyx mori

... treated with hot water(46 centigrade,18min) immediately after oviposition(0~10min).this hot-water treatment causes the fusion of an ameiotic femal pronucleus,2n(ZW),with a male pronucleus n(Z). but I have some question.I think the oocyte is haploid,but why it is the 2n(ZW). the oocyte should be ...

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by mloonjin
Sun Sep 10, 2006 1:51 pm
 
Forum: Zoology Discussion
Topic: silkworm,Bombyx mori
Replies: 0
Views: 1089

ummmmm

... produces mature sperm cells containing 23 chromosomes (22 chromosomes plus either X or Y). During fertilization of eggs (or oocytes) by sperm, a pronucleus containing half the egg chromosomes is ejected from the cell. Fusion of egg and sperm cells and their nuclei (the defining acts of all sexual ...

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by ginny
Mon Jul 18, 2005 11:25 pm
 
Forum: Molecular Biology
Topic: MITOCHONDRIA
Replies: 5
Views: 5607


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