pachytene
the stage of prophase during meiosis I in which homologous chromosomes are paired; they are condensing and coiling
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
Pachytene
[Gr. pachytes - thickness; Gr. tainia - ribbon]. The third stage in prophase 1 of meiosis in which there is further shortening and thickening of the bivalents.
3. Pachytene
Synapsis is now complete.
Recombination nodules appear (at least in some organisms, including humans). They are named for the idea that they represent points where DNA recombination is occurring.
Pachytene
The term proposed by von Winiwarter (1900), originally as an adjective, to describe the nuclei at a particular stage of prophase 1 of meiosis when homologous chromosomes are associated throughout their length. (Gk.
The pachytene stage, also known as pachynema, from Greek words meaning "thick threads,"[1] contains the following chromosomal crossover.
The expression of mouse XPF in pachytene spermatocytes corroborates other indications that XPF has an additional role in genetic recombination during meiosis.
This expression was introduced by Moses (1958) for the structure which he discovered in electron micrographs of paired chromosomes at the pachytene stage of meiosis.
 See also: Meiosis, Chromosome, Prophase, Chromosomes, Diplotene
  
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