In this longitudinal study, 4, 689 Iceland residents aged 33to 65 first participated in a population study and were questionedabout frequency of headaches and symptoms.
在这个纵向研究中，有4，689名冰岛居民，年龄在33到65岁之间，首次参与到人口研究中来，进行关于频发头痛及症状的调查。
Friedman's pricing formula takes into account square footage, cleaning frequency, and "population density."
Friedman的服务价格将面积，频率，甚至“人口密度”都计算在内。
Most studies could not quantify disease frequency in the general population as they are hospital-based and confounded by variations in threshold and the rate of hospitalization.
多数研究不能把一般人群当中的发病频率给予定量是因为它们是基于医院的并且被混杂在住院率的变化之中。
When biologists say that they have observed evolution, they mean that they have detected a change in the frequency of genes in a population.
当生物学家说他们观察到进化时，意思是他们发现了一个种群中基因频率的变化。
They maintain that the population base used to give frequency statistics must be drawn from the suspect's particular gene pool.
他们声称用于频率统计的人口基数必须从嫌疑犯的特定基因库中获得。
The frequency of these deletions in the population at large is not yet clear, but is believed to be around 1%.
这些缺失大范围人群中的发生频次尚不清楚，但是有估计是在1%左右。
Objective: To screen a new Y-chromosome locus and investigate the distribution of allele frequency in Shanxi han population.
目的：筛选新的Y染色体基因座，调查其在山西汉族人群中的等位基因频率分布。
Not only the Athletics Level, the tennis population, but also the construction of the facilities and the all kinds 'tournaments 'frequency and quality have represented a great improvement.
无论是竞技水平，网球人口，还是场地设施建设，各级各类赛事的频率和质量，都得到了很大的提升。
Law of changes of gene frequency was core of research on population genetics, was also a key of understanding biological evolution.
基因频率变化规律是群体遗传学研究的核心，也是理解生物进化的关键。
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 strains population was virulent to all 30 rice blast monogenic lines, virulence frequency(VF)ranged from 17.
病菌群体对所测定的30个抗瘟基因均表现出毒性，毒力频率为17。
Allele frequency data were very important for study of population genetics and evolutionary biology.
等位基因频率资料是群体遗传学的重要资料，也是进化生物学的重要资料。
So, if you have recombination at a certain frequency, I can say exactly how much that helps or hurts the fitness of the population.
因此，如果你获得一定水平的重组率，我可以准确得出它在多大程度上促进或损害人口的适应性。
The probability distribution of gene frequency was studied by simulative method in finite population.
本文采用计算机模拟的方法，对有限群体中基因频率的概率分布进行了研究。
The results show that the frequency of allele gene C1166 is 0.034, the population is not genetic equilibrium.
结果表明C1166的基因频率为0.034，所检验的群体为遗传不平衡群体。
Objective To investigate the genetic polymorphism of HLA-B locus in Guangdong Han population and compare the characteristic of the allele frequency distribution with that in other populations.
目的调查广东汉族人群HLA-B位点基因多态性，比较不同人群HLA-B等位基因频率分布特征。
Objective to investigate the genetic polymorphism of HLA-DRB1 allele in Chongqing population and to analyze the characteristic of the allele frequency distribution.
目的了解重庆地区人群HLADRB1基因多态性，分析人群HLADRB1基因频率分布特征。
The value of the boundary at the 25th, 50th, or 75th percentiles of a frequency distribution divided into four parts, each containing a quarter of the population.
四分位值在被分成四部分频数分布中位于25，50或75点的边界值，每部分包含四分之一人口。
Objective: To study the distribution of genotype frequency and gene frequency of ABO blood type in different population and the relation between ABO blood type and disease.
目的：了解abo血型频率和基因频率在不同人群中的分布以及血型与疾病的关系。
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。
Population genetics analysis, Detected by genotype frequency distributions of the polymorphic loci is associated with species.
群体遗传学分析发现，所检测到的多态位点基因型频率分布与品种相关联。
From subdividing the traveling market, this part also expands the traveling market structure from population attribute, tourist behavior and frequency of their visiting.
从旅游市场细分角度出发，从人口属性、到游次数和旅游行为三维度对市场结构进行扩展；
Mutations in the BRCA1 and BRCA2 genes are known to lead to breast and ovarian cancer. However, the frequency of these mutations in the general population has not been well-characterized.
熟知brca1和BRCA2基因突变可引起乳癌和卵巢癌，不过在普通人群中突变的频率还没有很好地描述。
Objective: To acquire and investigate the gene frequency of D12S1686 in Han ethnic population of Liaoning, China.
目的获得并研究中国辽宁汉族人群D12S1686位点的基因频率。
The grave issues involved in the current environmental dilemma include high population density, environmental pollution, an overabundant of silt in rivers and lakes, and the frequency of disasters.
但当前这一地区环境问题并不理想，人口密集、环境污染、河湖淤浅、灾害频发等矛盾比较突出。
Results: The most influential parameters of sample size were susceptibility frequency of the genotype, environmental exposure factors in the population, and genetic modes.
结果：主要影响样本大小的参数为易感基因频率、环境因素暴露率、基因遗传方式，而疾病的发生率对样本量影响很小。
Objective Survey the frequency of H deficient phenotype in blood donor population and analyze the serological and genetic characteristics of these individuals.
目的调查献血者人群中H抗原缺失血型的表型频率，研究其血清学和遗传学特征。
Objective Survey the frequency of H deficient phenotype in blood donor population and analyze the serological and genetic characteristics of these individuals.
目的调查献血者人群中H抗原缺失血型的表型频率，研究其血清学和遗传学特征。
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