染色体

Results:There were no significant difference in chromosomal aberration,sister chromatid exchangeand micronuclei.

结果：染色体畸变率、姊妹染色单体交换、微核率，各处理组与对照组比较均无显著性差异。

But as a extreme poison, arsenic could induce many cytogenetical changes,such as chromosome loss, breakage and sister chromatid exchange and so on.

但砷剂同时又是一种剧毒物质，可引起染色体断裂、丢失、姊妹染色单体互换等细胞遗传学改变。

Cell cycle is the cell through a series of orderly changes in the cells to achieve cell growth and proliferation process of cell cycle regulation and individual development, differentiation, growth, regeneration, aging and cancer cells is closely related to eukaryotic cell cycle mitosis two key processes, namely DNA replication and sister chromatid evenly assigned to the sub-cells.

细胞周期是指细胞通过一系列有序的细胞内变化，实现细胞生长和分裂增殖的过程细胞周期的调控与个体发育、分化、生长、再生、衰老以及细胞的癌变密切相关真核细胞有丝分裂周期有两个关键的过程，即DNA的复制和姐妹染色体均衡地分配到子细胞中。

The reason is that there are some boundary elements that separating chromatin into different domains.

这是由于一些边界元件将染色体分成了不同的区域。

It is this that is visible as the typical looped threadlike chromatin material of the nondividing chromosome.

这就是在不分裂染色体中可见的典型的松弛的线状染色质。

Results This material had no cytoxicity,no s en-sitivity,no obvious haemolysi s,an d no mutagencity in Ames test,mice marrow micronucleus test and chromo so me aberration test of mammalian cell in vitro.

Ames试验、小鼠骨髓细胞微核试验和哺乳细胞体外染色体畸变试验结果显示材料无致突变性。结论Evergel人工髓核材料具有良好的生物相容性，可以进行临床应用。

Recently,many articles reported the close correlation between human height and gene polymor- phism,such as GH1 gene, VDR gene ,CYP19 gene,estrogen receptor gene and a few regions in the Y chromo- some.

GH1基因、 VDR基因、CYP19基因、雌激素受体基因以及Y染色体均与人的身材高矮有密切联系。

The results indicated that chromosome counting was the most reliable and precise method, however, it was cumbersome and required skilled cytological techniques; The chromocenter size, heterochromatin number, chroloplast number of guard cell and certain plant morphological characteristics are simple and practical methods for ploidydetermination but with some shortages.

结果表明：对体细胞染色体的直接计数法是最可靠的方法，但费时、难度大；叶片气孔大小与倍性无显著相关性；保卫细胞叶绿体数目、体细胞染色中心大小以及异染色质个数与黄瓜倍性密切相关，是简单、快速而有效的倍性鉴定方法；植株的形态学观察也能间接确定植株倍性，但鉴定时期偏晚，精确性较差。

Objective To study the sex chromosome copy number alterations in lung cancer.

目的 研究肺癌细胞中性染色体拷贝数的异常。

The results show that the chromosome number 46 takes 56%,and number 40 takes 44% in Ca76/s model.

含46条的占56％，含40条的占44％，共发现6条标记染色体，出现频率为10／10。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！