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pronuclei    
pronucleus的复数形

pronucleus的复数形

Pronucleus \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.
[1913 Webster]

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 spermatozoon 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.
[1913 Webster]


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  • Pronucleus - Wikipedia
    A pronucleus (pl : pronuclei) denotes the nucleus found in either a sperm or egg cell during the process of fertilization The sperm cell undergoes a transformation into a pronucleus after entering the egg cell but prior to the fusion of the genetic material of both the sperm and egg
  • Pronuclei | definition of pronuclei by . . . - Medical Dictionary
    In embryology, the nuclear material of the head of the sperm (male pronucleus) or of the oocyte (female pronucleus), after the oocyte has been penetrated by the sperm; each pronucleus normally carries a haploid set of chromosomes, so that the merging of the pronuclei in fertilization reestablishes diploidy
  • Introduction into the creation and development of the . . .
    The unpacked DNA is enclosed in the slowly forming paternal and maternal pronuclei During a synthesis phase the duplication of the DNA occurs in them After the synthesis phase, which takes almost a day, the DNA condenses into chromosomes These promptly order themselves on the zygote's mitotic spindle so this can divide into the two-cell stage
  • Fertilization - Molecular Biology of the Cell - NCBI Bookshelf
    Fertilization is not complete, however, until the two haploid nuclei (called pronuclei) have come together and combined their chromosomes into a single diploid nucleus In fertilized mammalian eggs, the two pronuclei do not fuse directly as they do in many other species
  • Pronucleus - an overview | ScienceDirect Topics
    The pronuclei are far from merely a passive staging area for the two parental genomes prior to assembling the zygotic genome Both sets of chromatin undergo asynchronous DNA synthesis at pronuclear stage, generating the 4C amount of DNA required for the ensuing first mitosis
  • pronucleus - Repropedia
    Similarly, the sperm DNA will also decondense and the male pronucleus will form In many species, the male pronucleus is larger than the female one A diploid zygote will be produced when the haploid male and female pronuclei fuse just prior to the first mitotic division
  • Two mechanisms drive pronuclear migration in mouse zygotes
    The mechanisms that then move the pronuclei inwards for their unification are only poorly understood in mammals Here, we report two mechanisms that act in concert to unite the parental genomes





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