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pachytenepachytène (fr.); Pachytän (ger.)

  • In cell division: the third stage of the first meiotic prophase, following zygotene, during which the paired chromosomes shorten and thicken, the two chromatids of each may separate, and exchange of segments between chromatids may occur. (OED 2011)
    cell diplotene leptotene zygotene
    noyau pachytène
    Winiwarter, H. von (1900). Recherches sur l’oogenèse et l’organogenèse de l’ovaire des mammifères (lapin et homme). Arch. Biol. (Liège, Paris) 17(1), 33-199.