Skip Navigation
Genetics Home Reference: your guide to understanding genetic conditions About   Site Map   Contact Us
 
Home A service of the U.S. National Library of Medicine®
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q-R | S | T | U | V | W | X | Y-Z

Pachytene

Definition(s)

Progression through the third stage of prophase I in meiosis, in which crossing over occurs between a chromatid in one partner and another chromatid in the homologous chromosome.

Definition from: Gene Ontology via Unified Medical Language SystemThis link leads to a site outside Genetics Home Reference. at the National Library of Medicine

The stage of meiotic prophase which immediately follows the zygotene and in which the paired chromosomes are thickened and visibly divided into chromatids.

Definition from: Merriam-Webster's Medical DictionaryThis link leads to a site outside Genetics Home Reference. by Merriam-Webster Inc.

See also Understanding Medical Terminology.

 
Published: May 20, 2013