But he thinks it can only go backward when the evolution of the trait is simple, like when a single mutation is involved.
但是他认为只有在新特征的进化是非常简单的情况下才可以逆转，例如只有一个位点发生突变。
The single mutation-at-a-time view would be like hoping you hit the Pick 4 lottery by getting one number a day for four days.
用四选一的彩票游戏打个比方。 单位点突变就类似四天当中每天都买4个号码中的一个，结果可想而知，都没中。
A single mutation, a different sequence in the DNA, causes the ribosome to use a different amino acid when it builds the lysozyme molecule.
单一突变，dna序列发生变化，会造成核糖体在构建溶解酵素分子时使用不同的氨基酸。
The video from which Figure 1 was captured is a visualization of part of a sequence of a lysozyme protein misfolding due to a single mutation.
图1的来源视频呈现了由于单一突变造成的溶解酵素蛋白质的序列的一部分。
It's plausible that millions of years ago a single mutation resulted in two different versions of the photopigment gene becoming located on the same X chromosome.
鼠类研究的主要作者Jeremy Nathans说，可能在亿万年前一种特别的突变造成感光素基因中两种不同的感光色素基因编码定位于同一个X染色体上。
For more details on what we do and some alternative approaches, see the link for "Destruction of long-range interactions by a single mutation in lysozyme" in Resources.
有关我们工作以及一些替代方案的详细信息，请参见参考资料中的“Destructionof long - rangeinteractionsbyasingle mutation in lysozyme”链接。
In a new study from MIT, researchers have identified a single mutation in the H1N1 genetic makeup that would allow it to be much more easily transmitted between people.
在麻省理工学院新的研究中，研究人员已经发现了H1N1病毒基因结构中的单个突变，使其能够更加容易在人与人之间传播。
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。
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。
In 2008, scientists from the University of Copenhagen, found that all people with blue eyes were descended from a single ancestor with a blue eye mutation who lived six to 10, 000 years ago.
2008年，哥本哈根大学的科学家们发现所有蓝眼睛的人都有一个共同的祖先，这位祖先生活在10,000年以前，眼睛出现蓝色变异。
Turkish scientists led by Tayfun Ozcelik from Bilkent University, in Ankara, suggested that a mutation in a single gene might result in quadrupedalism.
由来自土耳其安卡拉Bilken大学的塔伊丰Ozcelik带领的土耳其科学家说一个单独基因的突变会导致四肢行走。
In the 1950s Anthony Allison, a British biochemist, observed that Africans who carry a single copy of the genetic mutation that causes sickle-cell anaemia are protected against malaria.
英国生化学家AnthonyAllison在20世纪50年代观察到非洲人携带单拷贝的基因突变引起的镰状细胞性贫血保护了他们受到疟疾的侵扰。
Fragile X syndrome, a single genetic mutation on the X chromosome, is the most common source of inherited mental impairment, affecting one in every 4,000 boys and one in every 6,000 girls.
脆性X综合征，一个X染色体上的基因突变，是遗传性智力障碍最常见的来源，每4000名男孩和每6000名女孩中就有一名儿童患有该症。
Fragile X syndrome, a single genetic mutation on the X chromosome, is the most common source of inherited mental impairment, affecting one in every 4, 000 boys and one in every 6, 000 girls.
脆性X综合征，一个X染色体上的基因突变，是遗传性智力障碍最常见的来源，每4000名男孩和每6000名女孩中就有一名儿童患有该症。
The two patients have a mild form of ALS caused by a single genetic mutation, and all of the cells in their body carry that mutation.
有两个病人由于单一的遗传突变导致轻微的肌萎缩性侧索硬化，他们身体中所有的细胞都携带这种突变。
Like most cancers, it is thought to begin in a single cell, with a mutation that is not present at birth but that occurs later for some unknown reason.
我们认为该病与大多数癌症一样，是起源于单个细胞突变，但这种突变并不是先天的，而是发生于后天，但原因不明确。
Although a recent study found that a single gene mutation heightened the risk of obesity by up to 67 percent, genetics cannot explain the skyrocketing obesity trend.
尽管最近的研究发现单基因突变使肥胖的风险增加高达67%，但是遗传不能解释飞涨的肥胖趋势。
By sequencing the LRP6 gene in affected family members, the scientists found that the mutation caused the substitution of a single amino acid in the protein the gene produced.
通过对影响家族成员的LRP6基因测序，科学家发现了突变导致该基因产生的蛋白其中一个氨基酸替换了。
Single strand conformation polymorphism (SSCP) essay and sequence analysis of the PCR product were used to ascertain the gene mutation.
方法应用PCR及单链构象多态性(SSCP)分析技术结合基因序列测定方法确定突变类型。
Genetic analysis indicated that the mutation is controlled by single recessive gene.
遗传学分析研究表明，该突变为单基因细胞核隐性突变。
The low phytic acid mutation with mutant IR-lp1 is a recessive trait controlled by a single recessive nuclear gene.
研究发现：（1）低植酸突变为一隐性突变性状，此突变为单隐性基因突变；
British physician who first recognized a new class of genetically induced diseases resulting from a mutation in a single gene that causes the absence or malfunctioning of a particular enzyme.
英国内科医生。他首先发现一类新的基因诱导疾病是由于某一个基因发生突变从而导致某种特殊的酶缺乏或产生故障而引发的。
Results The microarray can identify a single base change of selected lamivudine resistance-related mutation and multiple mutation detection by a single assay as well.
结果我们研制的芯片能同时特异性地检测耐药相关单一或多位点突变。
Objective:To assess the roles of single stranded conformation polymorphism(SSCP)and heteroduplex polymorphism(HET)in screening gene mutation.
目的：评价异源双链分析（HET）和单链构象多态性分析（SSCP）在基因突变检测中的作用。
They discovered that a single DNA mutation within three different genes explained, in part, why some individuals have high or low blood glucose levels.
他们发现三个不同基因中的某一个单一dna突变可以部分解释人们血糖水平又高有低的原因。
Fortunately, a single gene mutation rarely causes things to go horribly wrong.
幸运的是，一个单一的基因突变很少导致严重错误的东西。
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。
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。
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