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。
So even though a drug might work well for patients whose tumors have a particular mutation, when the drug is used for a broader population, it shows only a small effect.
所以，即使一种药物对有同一变异的肿瘤患者有效，但当应用于更广泛的患者时就可能收效甚微。
The accepted scenario was a simple case of evolutionary selection. In a bacterial population exposed to a killer drug, a few lucky individuals might have a genetic mutation that kept them alive.
我们本以为这是再简单不过的进化选择了：当药物杀向全体细菌时，总有那么几个幸运儿，基因突变了，小命保住了，它们可以活下来继续繁殖下一代，而剩下的那些倒霉蛋就从此命归黄泉了。
There, they say, the mutation that existed in under a tenth of the population spread to nearly nine-tenths-because those with it survived far better than those without.
他们说，自此，本来存在于人口十分之一的基因突变扩展到将近十分十九——因为基因发生突变后的人更能适应新的环境。
If the new mutation does spread throughout a population, the scenario is even worse.
如果在一个种群里，新的突变确能传播开来，其境地就更糟。
Error catastrophe occurs when high mutation rates give rise to so many deleterious mutations that they make the population go extinct.
当高突变率引发众多能导致种群灭绝的有害突变时，错误突变便出现了。
The idea is that mutation contributes to variability and variability drives the success of a population in the face of a changing environment.
该理论是指突变有助于变异性而变异性则是一个物种在面对不断变化的环境时成功生存的助力。
A parthenogenetic population is, by definition, all female and the result, give or take the odd mutation, is that a rotifer's daughters are genetically identical to her.
按照定义，一个孤雌生殖的种群全部是雌性，无论赋予或去除稀有突变，结果都是：一只轮虫的后代的基因组与她完全一样。
In the HGA , heuristic algorithm is used to produced initial population , self-adaptive parameter are used in copy operator, crossover operator and mutation operator .
混合遗传算法在产生初始种群时引入启发式方法，采用自适应遗传参数和交替使用两种交叉算子；
Objective: To discuss mannose binding lectin (MBL) gene polymorphisms at 54 locus of Han population in Ningxia for further research on relationship of MBL gene mutation and HBV infection.
目的：探讨宁夏汉族人群中甘露糖结合凝集素(MBL)基因54位点多态性，为进一步研究MBL基因突变与乙型肝炎间的关联性提供依据。
The natural number coding, the random population selection, the simple crossover strategy of "two-parents-and-one-kid" and the fixed mutation probability were totally adopted.
在算法中采用了自然数编码、随机选取种群、简单的“双亲单子”交叉策略和固定的突变概率。
The main operators of the algorithm included hyper-mutation, positive selection to produce memory cells and excellent sub-population, similar cell suppression, reorganization operator.
算法主要包括超变异、正选择、记忆抗体产生、优育抗体产生、细胞相似抑制、整理算子。
It can result in mutation, inducing cancer and promoting cancer, which is a biomarker to research high-risk occupational population.
其具有诱导机体突变和致癌、促癌作用，也是研究肺癌高危人群的生物标志物之一。
The new algorithm was based on single population without intermediate population, in which mutation operation, crossover operation and selection operation were used on the current population.
该算法基于单种群，在演化过程中直接对当前种群进行变异、交叉和选择操作，无须差异演化算法中的中间过渡种群。
Objective To investigate if there is SCN5A gene mutation in sudden unexplained nocturnal death syndrome(SUNDS) cases in Chinese Han nationality population.
目的研究中国人青壮年猝死综合征（SUNDS）病例是否存在SCN5A基因突变。
In a bacterial population exposed to a killer drug, a few lucky individuals might have a genetic mutation that kept them alive.
当一个具有相当数量的细菌种群与一种杀菌剂“狭路相逢”时，只有少数幸运的细菌可以基因突变从而存活下来。
Objective to investigate the prevalence of the C282Y mutation in the HFE gene associated with hereditary hemochromatosis (HH) in the Henan Han population in China.
目的调查中国河南汉族人遗传性血色素沉着症hfe C282Y基因突变情况。
Objective to investigate the prevalence of the C282Y mutation in the HFE gene associated with hereditary hemochromatosis (HH) in the Henan Han population in China.
目的调查中国河南汉族人遗传性血色素沉着症hfe C282Y基因突变情况。
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