Scientists have found a genetic mutation that appears to be the cause of Huntington's disease.
科学家们已经发现一个似乎是亨廷顿病病因的遗传突变。
If a copy of a gene is a bit different from the original, that's called a genetic mutation.
如果一个复制的基因与原来的有些许不同，那就叫做基因突变。
Furthermore, the single copy of a founder mutation often confers a survival advantage on carriers.
此外，创始者突变的单一拷贝通常赋予携带者生存优势。
Cattle raising people in East Africa and northern Europe have gained a mutation that helps them digest milk as adults.
东非和北欧的养牛人发生了一种突变，帮助他们像成年人一样消化牛奶。
Norwegian scientists have analysed samples from more than 70 patients with clinical illness and no further instances of this mutation have been detected.
挪威科学家对从70多名临床疾病患者身上采集的标本作了分析，未发现更多的此类变异情况。
Their allele frequencies at numerous genetic loci gradually become more and more different as new alleles independently arise by mutation in each population.
随着新等位基因在每个群体中独立突变产生，它们在许多遗传位点上的等位基因频率逐渐变得越来越不同。
For example, the hereditary hemochromatosis mutation protects carriers from iron-deficiency because the mutated gene allows increased efficiency of iron absorption.
例如，因为突变的基因可以提高铁的吸收效率，所以遗传性血色素沉着病突变可以保护带菌者不缺铁。
While most disease-causing mutated are found in humans at a rate of one in a few thousand to one in a few million people, founder mutation can occur at much higher rates.
虽然大多数致病突变在人类中发现的概率为千分之一到百万分之一，但基础突变发生的几率可能高得多。
Founder mutations are a class of disease-causing genetic mutations, each derived from its own ancestral "founder" in whom the mutation originated.
创始者突变是一类引起疾病的基因突变，每一种都源自其自身祖先的“创始者”。
It was a silent mutation and was not associated with the traits of milk yield in buffalo.
这是一个无声突变，与水牛产奶量无关。
The objective is to analyse the mutation of K17 gene in a pedigree with steatocystoma multiplex.
目的是研究多发性皮脂腺囊肿一家系中角蛋白17的基因突变情况。
No pathogenic mutation was detected in the exon and franking regions of MYH9 gene except a synonymous mutation.
除同义突变外，在MYH9基因的外显子和弗兰克区域未检测到致病突变。
Turkish scientists led by Tayfun Ozcelik suggested that a mutation in a single gene might result in quadrupedalism.
由塔丰·奥兹利克带领的土耳其科学家提出，一个基因的突变可能会导致四足动物的出现。
This research intended to construct a eukaryotic expression vector with a site-directed mutation of porcine MSTN propeptide gene.
本研究旨在构建具有猪 MSTN 前肽基因定点突变的真核表达载体。
只是又一次失败的突变。
这样的变异率是普遍的吗？
Mutation of the tree while visiting.
在访问树的同时改变树。
Imagine a new mutation arising in a gene.
设想一下在一个基因上发生了一个新的突变。
这是突变。
The scientists found this mutation, at a gene called HERC2.
最终，这个团队发现了此变种，变异基因命名为HERC2。
Now they can and that helps keep the mutation in circulation.
不过现在可以了，这也助于让该突变维持流传。
But the drug also caused a mutation in the virus, they found.
但是他们发现，药物也造成了病毒的变异。
It wouldn't be mutation and evolution without a missing link.
如果没有缺失的一环的话那就不叫突变或进化了。
Now they can, and that helps keep the mutation in circulation.
不过现在可以了，这也助于让该突变维持流传。
Because of the mutation, the mice could not make functional leptin.
由于这一突变，老鼠不能生产功能性瘦素。
People with this mutation are more or less immune to HIV infection.
带有这种突变的人对于艾滋病毒感染存在或多或少的免疫能力。
And that, researchers say, is what makes the mutation tactic attractive.
同时，研究者们说，这是突变战术的吸引力所在。
Constant mutation and adaptation are the survival mechanisms of pathogens.
不断变异和适应是病原体的生存机理。
That strongly suggests a faster mutation rate is at least part of the answer.
这一发现充分说明：更快的突变速率至少在一定程度上解答了上述的问题。
This mutation has previously been identified in Viet Nam in one case in 2005.
这一突变以前在2005年越南的一个病例中曾得到鉴别。
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