He and his colleagues genotyped more than 8000 fish to find out how the frequency of different versions of the gene, or alleles, changed in the two populations between 1994 and 2003.
他和同事测定了8000多条鳕鱼的基因型，研究两个鱼群中不同版本的基因，或者说等位基因的频率在1994年至2003年间是如何变化的。
When some alleles have very low frequency in the gene frequency matrix, there would be "horse-shoe effect" in the Scallergram of correspondent analysis.
当基因频率矩阵中存在稀有基因时，其对应分析的散点图则呈现明显的“蹄型效应”。
Methods: By using polymerase chain reaction-sequence specific primers, frequency of HLADRB1 alleles in 72 patients with UC and 314 healthy controls were detected.
方法：采用序列特异性引物聚合酶链反应的方法对汉族72例uc患者和314例正常对照者HLA - DRB1基因分型。
Methods: By using polymerase chain reaction-sequence specific primers, frequency of HLADRB1 alleles in 72 patients with UC and 314 healthy controls were detected.
方法：采用序列特异性引物聚合酶链反应的方法对汉族72例uc患者和314例正常对照者HLA - DRB1基因分型。
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