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-)

(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

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun

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"

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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).

RECENT ADVANCES IN OOCYTES IN-VITRO MATURATION PROCESS IN BOVINES

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.

A New Diploid Number and Sex Chromosome System for the Family Hersiliidae from the Mediterranean Region of Turkey

(1964), and 100 well-spread diakinesis metaphase I cells were analyzed per animal to assess aberrations in five mice/group.

Modulatory effect of green tea against genotoxicity induced by hydrocortisonein mice/Efeito modulador do cha verde contra genotoxicidade induzida por Hydrocortisonein ratos

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)).

Cytomictic anomalous male meiosis and 2n pollen grain formation in Mertensia echioides Benth

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.

Spermatogenic waves and expression of AR and ERs in germ cells of Podarcis sicula

Table 2--Meiotic chromosome configurations at diakinesis and metaphase I and mode of reproduction of Paspalum.

Cytological and reproductive aspects in the Caespitosa group of Paspalum/Aspectos citologicos e reprodutivos no grupo Caespitosa do genero 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).

A. C. elegans screening platform for the rapid assessment of chemical disruption of germline function

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.

Cariotipos de Akodon orophilus Osgood 1913 y Thomasomys sp

A complete pairing of chromosomes, forming 21 bivalents, up to late diakinesis was observed in both lines (Fig.

Telomeric heterochromatin, seeds and meiotic characteristics in two tricepiro lines/Heterocromatina telomerica, semillas y caracteristicas meioticas en dos lineas de tricepiro

In meiotic cells, from leptotene to diakinesis stages, the X chromosome shows positive heteropycnosis, and is usually located outside the autosomal chromatin mass (Fig.

Karyotype and male pre-reductional meiosis of the sharpshooter Tapajosa rubromarginata (Hemiptera: Cicadellidae)

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'.

110 years of orthopteran cytogenetics, the chromosomal evolutionary viewpoint, and Michael White's signal contributions to the field