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ZYGOTENE [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2011-03-14

English

Subject field(s)
  • Genetics
DEF

Pattern formed by three homologous chromosomes, after their partial opening and the joining of the corresponding segments. This phenomenon occurs at the zygotene or pachytene stages and is reversible.

CONT

(Chromosome mutation) The three homologous chromosomes in the trisomic parent may pair in a variety of ways forming either a bivalent and a univalent, or a trivalent or they may fail to pair so that three univalents are formed.

French

Domaine(s)
  • Génétique
DEF

Figure formée par trois chromosomes homologues, après leur ouverture partielle et l'accolement des segments correspondants. Ce phénomène apparaît aux stades zygotène et pachytène, et est réversible.

CONT

Cette trisomie morphologiquement très probable, est d'autre part confirmée par l'existence de trivalents à la méiose chez les trisomiques 21 [...]

Spanish

Campo(s) temático(s)
  • Genética
Save record 1

Record 2 2003-11-13

English

Subject field(s)
  • Genetics
  • Botany
  • Morphology and General Physiology
DEF

Pairing of homologous chromosomes during the zygotene stage of meiosis.

CONT

In the somatic nuclei of most organisms the homologous chromosomes do not pair. However, during the zygotene stage of meiotic prophase synapsis of homologous chromosomes takes place. This pairing begins at a number of points and extends "zipper-like" until complete.

French

Domaine(s)
  • Génétique
  • Botanique
  • Morphologie et physiologie générale
CONT

[Le] stade zygotène [...] est caractérisé par l'appariement des chromosomes homologues de chaque paire, ou synapsis. Un tel appariement est un fait nouveau qui ne se produit pas dans une mitose normale.

Spanish

Campo(s) temático(s)
  • Genética
  • Botánica
  • Morfología y fisiología general
Save record 2

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