| 单词 |
chromocentre |
| 释义 |
chromocentre|ˈkrəʊməsɛntə(r)|
[ad. It. cromocentro (P. Baccarini 1908, in Nuovo Giorn. Bot. Ital. XV. 189), f. chromo- 2 + centre.]
A densely staining body formed in certain nuclei (see quot. 1949).
1926L. W. Sharp Intr. Cytology (ed. 2) iv. 89 In many nuclei there are at certain stages one or more conspicuous accumulations of karyotin at certain points in the reticulum. Of the many terms applied to these the most suitable seems to be chromocenters. 1930Biol. Abstr. IV. 2220/1 Cytological investigations in 3 angiosperm genera..show that there are 2 ways in which the chromocenters may originate. 1935T. S. Painter in Genetics XX. 302 In the salivary gland, this area lies within, or better, is a part of, the ‘chromocenter’, or what I termed chromatic coagulum in my first papers. 1949Darlington & Mather Elem. Genetics 383 Chromocentre, a body produced by fusion of the heterochromatin of the chromosomes in a resting nucleus. Especially applied to the Polytene chromosomes of Diptera. 1962Lancet 29 Dec. 1384/1 The Barr body is a chromocenter of characteristic shape and position formed by heteropyknosis of an X chromosome (or part of one). |
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