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diakinesis
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diakinesis
diakinesis Cytology. (ˌdaɪəkaɪˈniːsɪs) [mod.L., ad. G. diakinese (V. Häcker 1897, in Biol. Centralbl. XVII. 701), f. dia-1 + Gr. κίνησις motion.] The last stage of meiotic prophase, immediately preceding the disappearance of the nuclear membrane.1902 E. B. Wilson Cell (ed. 2) 440 Diakinesis (διά, th...
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Hypericum punctatum
Rather than pair at diakinesis the chromosomes link together in a chain and during the first metaphase the chromosomes tend to separate and alternate members
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zygotene
zygotene Cytology. (ˈzaɪgəʊtiːn) [a. F. zygotène (V. Grégoire 1907, in La Cellule XXIV. 371): see zygo- and -tene.] The second stage of the prophase of meiosis, following leptotene, during which homologous chromosomes begin to pair.1911 Jrnl. Morphol. XXII. 752 This view..goes on to show that after ...
Oxford English Dictionary
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Chiasma (genetics)
Chiasma frequency was scored at the later diplotene-diakinesis stages of meiosis.
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leptonema
leptonema, n. Cytol. (lɛptəʊˈniːmə) [a. F. leptonema (coined by V. Grégoire 1907, in La Cellule XXIV. 371): see lepto-, *-nema.] = leptotene n.1911 Q. Jrnl. Microsc. Sci. LVII. 8 For the various stages of the prophase I have used the nomenclature now generally adopted, based on that proposed by von ...
Oxford English Dictionary
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Prophase
Prophase I
Prophase I is divided into five phases: leptotene, zygotene, pachytene, diplotene, and diakinesis. Diakinesis
In the fifth and final phase of prophase I, diakinesis (from the Greek for "double movement"), full chromatin condensation has occurred and
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prophase
prophase Cytology. (ˈprəʊfeɪz) [ad. G. prophase (E. Strasburger 1884, in Arch. f. mikrosk. Anat. XXIII. 250): see pro-2 and phase.] The first stage in a mitotic or meiotic nuclear division, preceding prometaphase, during which the chromosomes become visible and shorten and the nuclear envelope disap...
Oxford English Dictionary
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Chorthippus brunneus
Chiasma frequency was scored during the subsequent diplotene-diakinesis stages of meiosis.
Development
C. brunneus are hemimetabolous.
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prometaphase
prometaphase Cytology. (prəʊˈmɛtəfeɪz) [f. pro-2 + metaphase s.v. meta- 4.] The stage in mitotic or meiotic nuclear division, following prophase and preceding metaphase, during which the spindle is formed and the chromosomes become oriented towards it.1931 W. J. C. Lawrence in Cytologia II. 361 The ...
Oxford English Dictionary
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细胞分裂
终变期(diakinesis)
此时细胞中已组装出减数分裂纺锤体。有一些物种的染色体在双丝期时会变得松散,当进入终变期后,它们又再次浓缩。当终变期进入尾声时,核仁会消失而核膜则会瓦解,且四分体会朝中期板移动。此时每一对同源染色体间至少都有一个交叉点,这些交叉点可避免四分体在SC解散时就彼此分离。
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Desert locust
early stages of meiosis (leptotene-early zygotene stages) caused a significant increase in chiasmata frequency when scored at the later stages (diplotene-diakinesis
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ring
▪ I. ring, n.1 (rɪŋ) Forms: 1 hring (hringc), 3– ring, 4–7 ringe; 3–6 ryng (4 rynk, 5 ryngg-), 4–6 rynge; 4–5 reng, 5 reyng. [Comm. Teut.: OE. hring, = OFris. hring, rhing, ring (Fris. ring), MDu. rinc, ring- (Du. ring), OS. hring (MLG. rink, ring-, LG. ring), OHG. hring (MHG. rinc, ring-, G. ring),...
Oxford English Dictionary
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Chromosomal crossover
Chiasma frequency was scored at the later diplotene-diakinesis stages of meiosis.
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