About The Word Pronucleus
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Pronucleus
| Pronucleus Definition And Meaning |
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What's The Definition Of Pronucleus?
[n] the nucleus of the ovum or sperm after fertilization but before they fuse to form the nucleus of the zygote
Synonyms | Synonyms for Pronucleus: Related Terms | Find terms related to Pronucleus: See Also | cell nucleus | karyon | nucleus Pronucleus In Webster's Dictionary \Pro*nu"cle*us\, n.; pl. {Pronuclei} (-[imac]). [NL.
See {Pro-}, and {Nucleus}.] (Biol.)
One of the two bodies or nuclei (called male and female
pronuclei) which unite to form the first segmentation nucleus
of an impregnated ovum.
Note: In the maturing of the ovum preparatory to
impregnation, a part of the germinal vesicle (see
{Polar body}, under {Polar}) becomes converted into a
number of small vesicles, which aggregate themselves
into a single clear nucleus. which travels towards the
center of the egg and is called the female pronucleus.
In impregnation, the spermatozo["o]n which enters the
egg soon loses its tail, while the head forms a
nucleus, called the male pronucleus, which gradually
travels towards the female pronucleus and eventually
fuses with it, forming the first segmentation nucleus.
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