Definition of Pachytene

1. Noun. The third stage of the prophase of meiosis.

Group relationships: Prophase
Generic synonyms: Phase, Stage



Definition of Pachytene

1. Noun. (biology) The third prophase of meiosis, during which the chromosomes shorten and divide into four chromatids ¹

¹ Source: wiktionary.com

Definition of Pachytene

1. [n -S]

Medical Definition of Pachytene

1. Classical term for the third stage of prophase I of meiosis, during which the homologous chromosomes are closely paired and crossing over takes place. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Pachytene Pictures

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Lexicographical Neighbors of Pachytene

pachyostosis
pachyote
pachyotia
pachyperiostitis
pachyperitonitis
pachyphyllous
pachypleuritis
pachypleurosaur
pachypleurosaurs
pachypodous
pachysalpingitis
pachysalpingo-ovaritis
pachysandra
pachysandras
pachysomia
pachytene (current term)
pachytenes
pachyvaginitis cystica
paci
paciently
pacier
paciest
pacifiable
pacific islands
pacific states
pacifical
pacifically
pacification

Literary usage of Pachytene

Below you will find example usage of this term as found in modern and/or classical literature:

1. Biological Bulletin by Marine Biological Laboratory (Woods Hole, Mass.) (1916)
"Previous to the pachytene stage the cells have increased but very little in size. Now they begin to grow rapidly, complete fusion occurring between the ..."

2. The Mechanism of Mendelian Heredity by Thomas Hunt Morgan (1915)
"... stage (entire cell); j, pachytene stage (bouquet pachytene); k, longitudinal splitting of threads ..."

3. An Introduction to Cytology by Lester Whyland Sharp (1921)
"A number of observers have reported an actual fusion of the conjugating threads, the resulting pachytene thread subsequently splitting, probably along the ..."

4. The Germ-cell Cycle in Animals by Robert William Hegner (1914)
"this is the pachytene stage. The filaments then begin to unravel (Fig. ... 5, contraction figure ; 6, 7, pachytene ; 8, early; 9, later diplotene; 10, ..."

5. The Germ-cell Cycle in Animals by Robert William Hegner (1914)
"this is the pachytene stage. The filaments then begin to unravel (Fig. ... 5, contraction figure ; 6, 7, pachytene; 8, early; 9, later diplotene ..."

6. The Physical Basis of Heredity by Thomas Hunt Morgan (1919)
"47, 6), the stage is called the thick thread or pachytene stage. There are half as many threads now present as at the beginning. ..."

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