These technologies use the ability of living cells to respond to the presence of chemicals by leaving specific fingerprints in the form of gene expression, according to their type.

具体是使用活细胞与某些化合物反应，根据它们的类型，在基因表达中释放特殊的指纹。

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A variant form of the EDAR gene is very common in East Asians and Native Americans, and is probably the reason that these populations have thicker hair than Europeans or Africans.

一个EDAR基因的变种形式在东亚人和美洲原住民中非常普遍，可能是这些人口拥有比欧洲人或非洲人更厚的头发的原因。

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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。

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Zeneca ordered a "wet" copy of a promising gene, in the form of a clone -- a colony of bacterial cells whose members all carry the desired snippet of DNA. These bacterial guinea pigs can then be used to try out antibacterial chemicals.

FORBES: Biology in silico

Thinner volunteers were found to be more likely to carry the protective form of the gene, while the other version was more common in obese people.

BBC: NEWS | Health | Gene that makes you eat too much

DeCode (nasdaq: DCGN - news - people ) said in its statement this morning that one form of the gene predisposed people to become fat, while another predisposed them to be thin.

FORBES: DeCode Finds A Fat Gene