| 释义 |
terminalization Cytology.|ˌtɜːmɪnəlaɪˈzeɪʃə n|
[f. terminal a. and n. + -ization.]
The movement of a chiasma or chiasmata towards the end of a separating bivalent.
1929C. D. Darlington in Jrnl. Genetics XXI. 266 The post-diplotene stages in this species are characterised by a regular movement of chiasmata towards the attachment constriction. The opposite movement, which I will call ‘terminalisation’, affords a sufficient and indeed the only explanation of the exceptional metaphase configurations found in Tradescantia. 1932Amer. Naturalist LXVI. 32 Related species differ in the degree of terminalization of chiasmata. 1979Nature 22 Mar. 349/2 The issue of terminalisation is relevant both theoretically (assessment of chiasma and crossover frequency) and practically (alleged factor in maternal-age-dependent non-disjunction in mammals).
Hence ˈterminalized ppl. a., (of a chiasma) having moved to, or situated at, the end of a separating bivalent.
1932C. D. Darlington Rec. Adv. Cytol. iv. 103 However many chiasmata are terminalised, the chromosomes remain associated by terminal chiasmata. Ibid. 104 (caption) Completely terminalised chiasmata. 1959Genetics XLIV. 711 Incompletely terminalized chiasmata were observed in these configurations. 1979Nature 22 Mar. 349/2 Our data do not indicate whether or not chiasmata are terminalised in the mouse. |