单词 | strepsinema |
释义 | † strepsineman. Cytology. Obsolete. A condition of the nucleus during cell division, characterized by pairs of chromosomes twisted around one another or in the form of twisted rings; in most cases applied to diplotene nuclei. ΘΚΠ the world > life > biology > biological processes > genetic activity > [noun] > stages of mitosis or meiosis resting stage1810 prophase1884 anaphase1887 metaphase1887 synapsis1895 telophase1895 maturation division1896 postsynapsis1898 strepsinema1900 synizesis1905 interkinesis1906 pachynema1909 telosynapsis1909 leptonema1911 metasyndesis1911 strepsitene1911 zygonema1911 zygotene1911 leptotene1912 pachytene1912 interphase1913 telosyndesis1920 prometaphase1931 dictyotene1957 dictyate1958 1900 H. H. Dixon in Proc. Royal Irish Acad. 1900–02 (1902) 6 2 In the next stage (fig. 2) the nucleus is in what I would suggest to call the ‘strepsinema’ condition. The chromatin appears in much the same condition as in the preceding stage, except that in many places it may be seen that the two portions of the thread are more or less loosely twisted together. 1911 Q. Jrnl. Microsc. Sci. 57 15 The onset of synizesis coincides with the entrance of the nucleus into strepsinema. 1925 E. B. Wilson Cell (ed. 3) ii. 126 A noteworthy peculiarity of the spireme sometimes seen is a twisting of the longitudinal halves about each other to form a strepsinema; but this is much less common in the somatic mitoses than in meiosis. This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018). < n.1900 |
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