By comparing the DNA of Japanese with each type, the researchers were able to identify the gene that controls which type a person has, they report in the Monday issue of Nature Genetics.

通过比较两种类型耳垢的日本人的DNA，研究人员鉴定出了控制耳垢类型的基因，研究结果刊登在周一发布的《自然遗传学》期刊上。

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It can work out where pheromone molecules are coming from by comparing the signals from each antenna, in the same way that a person works out the direction of a sound by comparing signals from each ear.

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So the two lines on one chart are not a good way of comparing the total numbers affected, just the chances for one person.

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Drawing distinctions purely on the way that a book has been published now says more about the person making the comparison than the books they are comparing.

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