单词 | chromonema |
释义 | chromoneman. Biology. The coiled threadlike core of a chromatid, believed by some to be the carrier of the genes. ΘΚΠ the world > life > biology > biological processes > genetic activity > genetic components > [noun] > chromosome > chromatid > core of chromonema1925 genoneme1934 1925 E. B. Wilson Cell (ed. 3) 1128 Chromonema, a fine basichromatic thread from which arises the spireme-thread. 1934 N. Koltzoff in Science 5 Oct. 313/1 The size of the chromosomes in the salivary glands is determined through the multiplication of genonemes. By this term I designate the axial thread of the chromosome, in which the geneticists locate the linear combination of genes; the cytologists call it generally the ‘axoneme’ or ‘chromonema’. 1954 Sci. News 34 71 Chromosomes consist of a number of tightly coiled threads—chromonemata—embedded in a matrix. 1957 Encycl. Brit. VI. 943/2 After the two daughter chromosome groups reach the poles each chromosome gradually takes on the appearance of a delicate, coiled thread... It is the chromonema..and represents the true, permanent part of the chromosome, including the hereditary materials. 1963 I. F. Henderson & W. D. Henderson Dict. Biol. Terms (ed. 8) 101/1 Chromonema, a coiled or convoluted thread in prophase of mitosis; central thread in chromosome. This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2019). < n.1925 |
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