synapsis

synapsis
The point-for-point pairing of homologous chromosomes during the prophase of meiosis. SYN: synaptic phase. [G. a connection, junction]

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syn·ap·sis sə-'nap-səs n, pl -ap·ses -.sēz the association of homologous chromosomes with chiasma formation that is characteristic of the first meiotic prophase and is held to be the mechanism for genetic crossing-over

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syn·ap·sis (sĭ-napґsis) [Gr. “conjunction”] the intimate association of homologous chromosomes, mediated by the synaptonemal complex, that occurs during the zygotene stage of meiosis I. [TA] official terminology for synapse.

Medical dictionary. 2011.

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  • Synapsis — (also called syndesis) is the pairing of two homologous chromosomes that occurs during meiosis. [cite journal |author=McKee B |title=Homologous pairing and chromosome dynamics in meiosis and mitosis |journal=Biochim Biophys Acta |volume=1677… …   Wikipedia

  • synapsis — ● synapsis nom féminin Synonyme de stade zygotène. ● synapsis (synonymes) nom féminin Synonymes : stade zygotène …   Encyclopédie Universelle

  • synapsis — pl. synapses, 1895 in biology, Mod.L., from Gk. synapsis “connection, junction” (see SYNAPSE (Cf. synapse)) …   Etymology dictionary

  • synapsis — synapsis. См. синапсис. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • synapsis — synapsis. = chromosome pairing (см.). (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • synapsis — [si nap′sis] n. pl. synapses [si nap′sēz΄] [ModL < Gr, junction, connection < syn , together + apsis, a joining < haptein, to join] 1. Genetics the association side by side of homologous maternal and paternal paired chromosomes in the… …   English World dictionary

  • Synapsis — La synapsis ou appariement est l union des chromosomes homologues qui donnent des tétrades , des groupes de 4 chromatides . La synapsis se déroule grâce à la formation du complexe synaptonémal, composé d une longue matrice protéique de chaque… …   Wikipédia en Français

  • Synapsis — ◆ Syn|ạp|sis 〈f.; ; unz.; Biol.〉 während der ersten Phase der Reduktionsteilung sich vollziehende Paarung der sich entsprechenden Chromosomen [<Syn... + grch. hapsis „Verbindung, Führung, Rundung, Wölbung“] ◆ Die Buchstabenfolge syn|a... bzw …   Universal-Lexikon

  • Synapsis — Meiose am Beispiel der Spermatogenese Unter Meiose (von griech.: meiono = vermindern, verkleinern), Reifeteilung oder Reduktionsteilung versteht man eine besondere Form der Zellkernteilung, wobei im Unterschied zur gewöhnlichen Kernteilung, der… …   Deutsch Wikipedia

  • synapsis — n.; pl. ses [Gr. synapsis, union] The intimate conjunction of homologous chromosomes that occurs during the prophase of the meiotic division …   Dictionary of invertebrate zoology

  • synapsis — synaptic /si nap tik/, synaptical, adj. synaptically, adv. /si nap sis/, n., pl. synapses / seez/. 1. Also called syndesis. Cell Biol. the pairing of homologous chromosomes, one from each parent, during early meiosis. 2. Physiol. synapse. [1645… …   Universalium

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