兼性异染色质是在特定细胞发育命运中可能具有转录活性的异染色质。
Facultative heterochromatin is the heterochromatin that may become transcriptionally active in specific cell development fates.
表现这种现象的染色体物质叫做异染色质。
Chromosome material with exhibits of such behaviour is called heterochromatin.
至于大量的异染色质还有什么作用仍然是一个问题。
What other functions abundant heterochromatin may perform are still an open question.
结果老年大鼠造牙本质细胞核出现切迹，内含大量异染色质；
Results The nuclei of the odontoblasts of the aging rats were notched and contained a large amount of heterochromatins.
目的分析疑有染色体异常个体的9号染色体异染色质区的变异。
Objective:To analysis the aberration of chromosome 9 heterochromatin for persons suspected to have chromosome abnormalities.
在细胞周期中，异染色质会被进行动态的调节，以响应发育信号。
Heterochromatin is dynamically regulated during the cell cycle and in response to developmental signals.
它们一般呈高核质比例，核多呈圆形或椭圆形，异染色质常聚集成块状；
The cultured cells had a high ratio of nucleus to cytoplasm. Nuclei were round or elliptical.
透射电镜显示，胞质内细胞器稀少，细胞核大，核内具有丰富的异染色质；
Results With phase contrast microscope, the rapidly adherent cells were uniformed small, large nucleus and epithelial-like.
如此大量的结构异染色质的来源及其在染色体组型进化和物种形成中的任务仍是一个谜。
The origin of such large amounts of constitutive heterochromatin and their role in karyotype evolution and speciation remain a mystery.
病程 3 月组，上述改变加重，毛细血管扩张、基底膜增厚，视杆细胞核固缩、异染色质浓集；
In 3-month-course group, all the changes above appeared to be more serious with capillarectasia, basement membrane thickened, rod-cell nucleus pyknosis and metachromatin condensed.
推测副缢痕附近异染色质的DNA重复序列可能是在进化过程中通过染色单体不均等交换而逐渐形成。
It is presumed that the repeated DNA sequences of the heterochromatin near the secondary constriction might be formed gradually in the process of evolution through unequal SCEs.
概述了异染色质生化组成及其在超微结构方面的研究进展，着重介绍了着丝粒的异染色质超微结构研究。
The paper has summarized development of biochemical component and ultrastructure of heterochromatin in eukaryote with an introduction to the development of ultrastructure in centromere.
结果表明，Y染色体异染色质可能在人的个体发育过程中对形态生理学性状间的表型关系起一种修饰作用。
The results suggest that the Y chromosome heterochromatin appears to have a modifying effect on the phenotypic relationship between morphophysiological traits during human ontogenesis.
与之相比，在核纤层蛋白相关的异染色质区域以及位于细胞核中部的转录活跃区域并不会得到病毒的青睐。
This region contains a series of cellular genes, which are preferentially targeted by the virus, and characterized by the presence of active transcription chromatin marks before viral infection.
从分析比较中也看出，黑麦c -带带型的异染色质多态性现象明显存在。而野生黑麦的杂合性现象也较明显。
The heterochromatic polymorphism of C-banding patterns in rye and the heterozygosity in wild rye are found in our analysis.
从分析比较中也看出，黑麦c -带带型的异染色质多态性现象明显存在。而野生黑麦的杂合性现象也较明显。
The heterochromatic polymorphism of C-banding patterns in rye and the heterozygosity in wild rye are found in our analysis.
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