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.
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.
异代换系均生长旺盛，结实正常，说明异染色体能较好地补偿所缺失的小麦染色体。
Alien substitution lines are vigorous and fertile, indicating that the alien chromo-somes are able to compensate for the missing chromosomes.
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.
甲苯胺蓝染色，细胞周围基质呈异染性。
Stained with toluidine blue, the stroma around the cells showed metachromia.
结果24例异倍体病例pcna染色，其标记指数(PCNA - LI)与细胞增殖指数(PI)一致，均呈现高值。
Results PCNA label index (PCNA-LI) and proliferation index (PI) consistent in 24 heteroploid samples with PCNA staining were significantly higher value.
肿瘤易感性与异源物代谢酶遗传多态性和染色体畸变等相关。
Tumour susceptibility is associated with genetic polymorphism of xenobiotics metabolism enzyme and chromosomal aberrations et al.
这些染色体异常可能是异源DNA整合到受体染色体，进行染色体重排所引起的复杂细胞学反应。
The main reason of abnormal meiosis of PMC are the complicated cytological reaction of recipient after exogenous DNA introduced into recipient chromoses.
从大棚土壤中分离到一株异养型硝化细菌，命名为菌株HN ，分离菌株为革兰氏染色阳性，球状或杆状。
A heterotrophic nitrifier, named strain HN, was isolated from the greenhouse soil. The cells of isolates were Gram positive, rod or coccus.
花粉粒染色法监测结果表明：同株异花间的花粉散布频率显著高于异株异花间（P<0.01）；
The results showed that the frequency of pollen dispersal (FPD) among flowers was significantly higher on the same cotton plant than on different ones (P<0.01).
对异基因外周血造血干细胞移植的猕猴，用Y特异性序列分析法和性别染色体检测法于移植后7及14天均检测到雄性供者嵌合。
Male donor chimerism were found on day 7 and 14 after allogeneic stem cell transplantation by Y-specific sequence and chromosome karyotype analysis.
它们的主要区别在于染色要求上：每一D-超边至少有两点异色，每一C-超边至少有两点同色。
The main difference between them is coloring requirements:every D-edge at least has two vertices colored differently, while every C-edge at least has two vertices of the same color.
在两种方法检测结果一致和不一致的标本中，出现17号染色体异倍体的比例分别为38%（42/110）和53%（10/19）。
The distribution frequencies of chromosome 17 aneusomy in agreed and disagreed cases of two methods were 38%(42/110) and 53%(10/19), respectively.
结果：80·43%（37/46）的标本中发现X和（或）Y染色体异倍体，主要特征为X染色体增多和Y染色体丢失。
RESULTS: Aeulpoidy, mainly featured in gains of chromosomal X and loss of chromosome Y were observed in 80.43% of 46 cases.
植物单体或双体异附加系是重要的遗传材料，在基因定位、物理图谱构建及染色体工程育种上具有十分重要的作用。
Monosomics and disomics additional lines of plants are the important materials in gene location, physical mapping and chromosome engineering breeding.
植物单体或双体异附加系是重要的遗传材料，在基因定位、物理图谱构建及染色体工程育种上具有十分重要的作用。
Monosomics and disomics additional lines of plants are the important materials in gene location, physical mapping and chromosome engineering breeding.
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