A dating service set up by biology students in Munich, Germany is testing subjects' DNA to find the most compatible gene pools.
一家由德国慕尼黑几个生物学生创办的婚介机构决定通过测试客户的DNA来确定基因最匹配的对象。
These smaller groups effectively formed genetic bottlenecks, small gene pools in which chance mutations such as red hair were able to come to the fore.
这些小群体有效构成了遗传瓶颈，微型基因库里面的偶发变异，如红发，便涌现了出来。
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