diakinesis


Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.

di·a·ki·ne·sis

 (dī′ə-kə-nē′sĭs, -kī-)
n. pl. di·a·ki·ne·ses (-sēz)
The final stage of the prophase in meiosis, characterized by shortening and thickening of the paired chromosomes, formation of the spindle fibers, disappearance of the nucleolus, and degeneration of the nuclear membrane.

di′a·ki·net′ic (-nĕt′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

diakinesis

(ˌdaɪəkɪˈniːsɪs; -kaɪ-)
n
(Zoology) the final stage of the prophase of meiosis, during which homologous chromosomes start to separate after crossing over
[C20: from dia- + Greek kinēsis movement]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

diakinesis

the final stage of prophase prior to the dissolution of the nuclear membrane. — diakinetic, adj.
See also: Biology
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.diakinesis - the final stage of the prophase of meiosis
prophase - the first stage of meiosis
phase, stage - any distinct time period in a sequence of events; "we are in a transitional stage in which many former ideas must be revised or rejected"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The nucleus quickly disappears after contact via the cytoplasm, and chromatin is reduced during the so-called diakinesis phase (Hashimoto et al., 2019).
During diplotene, diakinesis and metaphase I, 16 autosomal bivalents and three univalent sex chromosomes were seen; generally, one chiasma (i.e., interstitial or terminal type) per bivalent was observed (Fig.
(1964), and 100 well-spread diakinesis metaphase I cells were analyzed per animal to assess aberrations in five mice/group.
However, initiation of the protoplasmic fusion in some PMCs seems to have taken place at later stages like diakinesis (Figures 1(c) and 1(d)) and metaphase-I (Figure 1(b)).
The spg are located on the basal membrane; above these, many spcI in different stages of the meiotic prophase from preleptotene, pachytene, diplotene until diakinesis are easily recognizable according to the aspect of thechromatin.
Table 2--Meiotic chromosome configurations at diakinesis and metaphase I and mode of reproduction of Paspalum.
At the stage of diakinesis (end of prophase I), when fully cellularized oocytes are positioned in a single continuous row in wild-type worms, we also detected unevenly spaced nuclei, suggesting a defect in cytokinesis (white arrows).
In all samples the karyotypes were obtained by counting the chromosomes of at least seven of the better metaphases (and diakinesis in males) for individual, by arranging and qualifying the chromosomes according to Levan et al.
In meiotic cells, from leptotene to diakinesis stages, the X chromosome shows positive heteropycnosis, and is usually located outside the autosomal chromatin mass (Fig.
In a comprehensive study of 33 species of the Eumastacid subfamilies Thericleinae and Euschmidtiinae from Africa (White 1965a), a number of meiotic peculiarities unique to Thericleinae were disclosed for the first time: in the majority of species, classic diplotene and diakinesis are omitted in male meiosis, and chiasmata only appear at early or midmetaphase I; the latter species are 'cryptochiasmate'.