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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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