一个突变细胞如发生克隆性扩增，就引起这些大量突变。
They arise when there is a clonal expansion of a mutated cell.
这项检测表明病毒是近期感染因为病毒传播给他人前并没有发生大量突变。
The genetic tests indicated that not much mutation had taken place before the virus had spread, suggesting short-term infection.
癌症研究院的伊丽莎白·拉普利博士补充道：“这是一项激动人心的研究。它为我们提供了大量信息，揭示了DNA的突变是如何引发及推动癌症产生的。”
Dr Elizabeth Rapley, of The Institute of cancer Research, added: "These are exciting studies that show us a great deal about how cancer is triggered and driven by mutations in DNA."
最近的一项毒理学化学研究显示，几分钟之内，将香烟烟雾大量吸入肺部，香烟烟雾则产生与肺癌有关的基因突变。
Within minutes of being inhaled into the lungs cigarette smoke causes genetic mutations linked to lung cancer, according to a new study in the Chemical Research in Toxicology.
恪守无性清律的物种，在基因高突变率下特别脆弱，大量的突变使原有的遗传基因大伤元气。
They are particularly vulnerable to high mutation rates, which undermine genetic vigour.
这些改变可能包括基因组的大量缺失，或者额外重复片断的增加，特别是快速突变和常见的变异。
Such changes could include wholesale deletions of chunks of the genome or additions of extra copies. Cancer genomes, in particular, mutate rapidly and contain frequent abnormalities.
在这份研究中，研究人员研究带有大量致病基因突变的人，来调查失聪的原因。
In this study, the researchers were looking at a population with high rates of disease-causing gene mutations to investigate genetic causes of deafness.
基因捕获技术是一种产生大规模基因突变的便利手段，对于揭示大量基因序列所对应的基因功能具有重要应用价值。
Gene-trapping is an advantageous technique for generating gene mutations massively which is important to identify the functions of large quantities of gene sequence.
CFTR由于其突变能导致致命性遗传疾病CF而备受关注，人们对其结构、功能进行大量研究取得了很大成果。
Mutations of CFTR may lead to the lethal genetic disease Cystic fibrosis (CF), so many attentions have been paid to the CFTR study.
大量定点突变实验、选择性化学修饰实验、抗多肽抗体结合实验等能很好地确证该联配结果的正确性。
The reliability of the method was confirmed by site-directed mutagenesis, selective chemical modification, site-specific antipeptide antibody binding experiments, and so on.
该技术速度快，易于自动化，特别适合大量单碱基突变基因的筛查。
This method is characteristic of high speed, easy automation, and is especially suitable for high throughput screening.
突变体是功能基因组学研究的重要材料，因此，通过人为诱导获取大量的突变系统是及其重要的手段。
Since mutants may play important roles in functional genomics research, obtaining a large of mutant strains with manually induced mutations is a very important strategy.
结果各水样中有大量的碱基移码型的直接致突变物和少量的需经代谢活化的碱基移码型的直接致突变物。
Results all samples of water have plenty of direct mutagen and a small amount of indirect mutagen of base frameshift mutation.
突变是发生在一个叫DMPK基因中出现大量的CTG的重复序列。
The mutation is an increased number of CTG repeats in a gene called DMPK.
突变是发生在一个叫DMPK基因中出现大量的CTG的重复序列。
The mutation is an increased number of CTG repeats in a gene called DMPK.
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