from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The third stage of the prophase of meiosis during which the homologous chromosomes become short and thick and divide into four distinct chromatids.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The third prophase of meiosis, during which the chromosomes shorten and divide into four chromatids
from the GNU version of the Collaborative International Dictionary of English
- n. The third stage of the prophase of meiosis, the stage in which the pairing of homologous chromosomes has been completed.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the third stage of the prophase of meiosis
Each chromosome is identifiable by its relative length, by the location of its centromere, which is readily observed at the pachytene stage, and by the individuality of the chromomeres strung along the length of each chromosome.
By 1931, however, means of studying the "string" in some detail was provided by newly developed methods of examining the ten chromosomes of the maize complement in microsporocytes at the pachytene stage of meiosis.
The increase in clustered cells, is probably attributable in part to the recently described re-clustering of the centromeres at the side-by-side spindle pole bodies right after pachytene