"It seemed like the perfect chance for natural selection to act on a population," said Dr. Ilardo.
“这似乎是自然选择在一个群体中发挥作用的完美机会。”伊拉尔多博士说。
That has provoked a debate about whether the phenomenon is an aberration, or whether natural selection favours it, at least when it is rare in a population.
这激起了一场争论，到底这种现象是误差，或是自然选择偏爱的结果(至少当它在群体中只占有稀少比例时)。
Based on the selection, the city population and ranking are fetched from the database and displayed in a Relational Record List.
基于所选择的城市，将从数据库中获取城市人口和等级，并显示在一个关联记录列表中。
The fewest signals of selection were seen among people who live in the humid tropics, the ecoregion where the ancestral human population evolved.
最少观察到遭到自然选择的是生活在潮湿热带气候地区的人们，这些地区是人类祖先的栖息地。
Presumably, different mutations were available in each population for natural selection to work on.
为了使自然选择得以进行，不同的变异对于各类人种大概都是适用的。
The cases of natural selection that have been tracked so far take the form of substantial sweeps, with a new version of a gene being present in a large percentage of the population.
我们目前跟踪过的自然选择案例大多都较为全面经历过基因扫描，新版基因在某种人当中出现比例非常大。
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。
In response to the appearance of such variants in the cell population the concentration of the toxic chemical in the growth medium is increased, thus keeping the selection pressure constant.
为应对细胞污染中出现的变异，有毒物质的浓度是逐步增加的，以此保证筛选力度的稳定。
Usually duplication of the entire population will be made after selection or before variation.
通常在选择或者变异之后，会做整个种群的副本。
Two inbred lines of maize, ZA5716 and ZA6192, with high combining ability and disease resistance, were obtained from a breeding population improved by recurrent selection.
从轮回选择法改良的玉米育种群体中，选育出了配合力高、抗病性强的玉米新自交系za5716和ZA6192。
The result indicate that population gene frequency variety expedite by selection and the test testify green-shell character is controled by a pair of complete dominant allele.
选择加快了群体基因频率的改变，青壳蛋性状确为由一对主效基因控制的完全显性遗传性状。
The model selection of population prediction and scientific confirmation of prediction parameters are two most important basic steps.
人口预测模型的选择和预测参数的科学认定，是人口预测实践中最重要的两个基本环节。
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。
While the clonal selection principle is responsible for generating the memory cell population, the immune network theory prevents the population size from increasing quickly.
克隆选择用来产生抗原的记忆细胞群体，免疫网络理论则用来抑制该群体规模的快速增长。
When the same recurrent selection porgram was used in various population, the greater the coefficient of variation of the population, the greater the genetic progress it made.
不同群体采用同一种轮回选择方案，表现出变异程度大的群体，选择的遗传进展也大。
The selection of effective plant percentage and stem thick can improve the resistance to viruses in population and the yielding ability.
群体有效株率和茎粗的选择可使抗病性和丰产性同步提高。
How sensitive is your model to the population selection for various migration phases?
您的模型对于各种迁移阶段的群体选择有多敏感？
And it illustrates the planning procedure: investigation and analysis, site selection, calculations population, arrangement of facilities, making vegetation plan.
认为防灾公园的规划程序应包括调查分析、场地选择、避难人口的统计、防灾设施的安排、绘制平面图，制定防灾植被规划等。
Meanwhile, different population scale and selection strategy play a very important role in the algorithm function.
同时，不同的群体规模和选择策略对算法性能的影响起到举足轻重作用。
The adverse selection of population quality of China is not only the research object of many subject, but also is arguing focus of academe.
中国的人口素质逆淘汰问题不仅是多学科的研究对象，而且是学术界争论的焦点。
Random fluctuations in the frequency of the appearance of a gene in a small, isolated population, presumably owing to chance rather than natural selection.
在一个小的、与世隔绝的种族里，基因面貌频率上的偶然波动，可能因为偶然性而不是自然选择。
The same basic population C0 had been selected for four cycles with Dominant male sterile wheat by means of the half-sib mating recurrent selection and the mass recurrent selection programmes.
以显性雄性不育小麦为材料，采用改良半姊妹和混合轮回选择两种方案，对同一基础群体C_0进行了四轮选择。
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。
This paper describes a method which has been used for stand population selection and classification based on the plus trees selection principle of a single tree.
本文将林木树种单株选优原则和方法运用到林木群体选择和划分上。
Yi, taken by Milwaukee with the sixth selection last Thursday despite indications he preferred playing in a city with a larger Asian population, has not met team officials since being picked.
上周四，易建联在第六顺位被雄鹿队选中，但至今还没有与球队的官员会面。此前，阿联表示更想在亚洲人口多的城市效力。
Effective population size and breeders selection manners affect the effect of breeds conservation.
群体有效大小和留种方式影响保种的效果。
Collectively, common variants have explained a small fraction of the risk of most diseases in the population, as we would expect from the effects of natural selection, 'Lifton explained.
Lifton解释道：“像我们从自然选择的效应中所期待的那样，普通变异已经解释人群中大多数疾病风险的一小部分。”
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 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。
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