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单词 diakinesis
释义

Definition of diakinesis in English:

diakinesis

nounPlural diakineses ˌdʌɪəkʌɪˈniːsɪsˌdīəkəˈnēsis
mass nounBiology
  • The fifth and last stage of the prophase of meiosis, following diplotene, when the separation of homologous chromosomes is complete and crossing over has occurred.

    〔生〕(细胞减数分裂)终变期

    Example sentencesExamples
    • Their nuclei contain univalents as well as bivalents at diakinesis and metaphase I.
    • For F59A1.7, affected worms exhibiting a high frequency of achiasmate chromosomes at diakinesis also had abnormally large nuclei at the pachytene stage, earlier in meiotic prophase.
    • However, in the mouse, cytogenetic examination of chiasmata at diakinesis has been widely used to study genetic recombination.
    • Loose condensation of chromosomes was observed in 12% of the cells from diakinesis to anaphase.
    • In wild-type hermaphrodites, germ cells at the dorsoventral flexure exit the pachytene stage of the first meiotic prophase and proceed to diakinesis.

Origin

Early 20th century: from dia- 'through, across' + Greek kinēsis 'motion'.

Definition of diakinesis in US English:

diakinesis

nounˌdīəkəˈnēsis
Biology
  • The fifth and last stage of the prophase of meiosis, following diplotene, when the separation of homologous chromosomes is complete and crossing over has occurred.

    〔生〕(细胞减数分裂)终变期

    Example sentencesExamples
    • In wild-type hermaphrodites, germ cells at the dorsoventral flexure exit the pachytene stage of the first meiotic prophase and proceed to diakinesis.
    • Their nuclei contain univalents as well as bivalents at diakinesis and metaphase I.
    • However, in the mouse, cytogenetic examination of chiasmata at diakinesis has been widely used to study genetic recombination.
    • For F59A1.7, affected worms exhibiting a high frequency of achiasmate chromosomes at diakinesis also had abnormally large nuclei at the pachytene stage, earlier in meiotic prophase.
    • Loose condensation of chromosomes was observed in 12% of the cells from diakinesis to anaphase.

Origin

Early 20th century: from dia- ‘through, across’ + Greek kinēsis ‘motion’.

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更新时间:2025/7/5 2:06:37