This work has provided a solid basis for molecular marker_assisted selection (MAS) for disease resistance, and made location and cloning of disease resistant genes possible.

这为进行抗病分子标记辅助选择，以及最终定位与克隆其抗病基因打下了良好基础。

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But urban life may have also influenced human genes, making the descendants of ancient city dwellers more resistant to disease.

但是城市生活可能也已经改变了人类的基因，使那些旧城市的居民后代对疾病的免疫增强了。

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But urban life may have also influenced human genes, making the descendants of ancient city dwellers more resistant to disease. That's according to a study in the journal Evolution.

但是，根据《进化》杂志刊登的一项研究，城市生活也可影响人类基因，使得古城居民的后代对疾病更具抵抗力。

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In theory, disease could also spread if the animal microbes pass their drug-resistant genes to human bacterial strains.

BBC: Animals and antibiotics: the risks

The ministry would also like to oversee a wider distribution of genes from the small percentage of British rams that are resistant to scrapie, a sheep disease similar to bovine spongiform encephalopathy, or mad-cow disease as it is more commonly known.

ECONOMIST: The search for long-lived sheep sperm