Pachytene

Definition

noun

The stage next to zygotene wherein the homologous chromosomes shorten, thicken, and separate into four distinct chromatids joined at the centromeres.


Supplement

During the first prophase of meiosis I, there are five sub-stages: leptotene, zygotene, pachytene, diplotene and diakinesis.


Word origin: French pachytène : Greek pakhus, thick + French -tène, ribbon pachytene French pachytène : Greek pakhus, thick + French -tène, ribbon


Synonym: pachynema

See also: prophase I, meiosis I

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