People with a common ancestry, however, tend to have similar collections of SNPs (pronounced "snips").

但是，有相同祖先的人倾向于拥有相似的SNPs。

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The best chance occurs in stable rural communities with a common ancestry - where people carrying the genes are likely to meet and have children.

产生红发的最佳环境是拥有共同祖先的稳定乡村社区，因为这里携带红发基因的人群结合生子的几率较大。

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