For example, the hereditary hemochromatosis mutation protects carriers from iron-deficiency because the mutatedgene allows increased efficiency of iron absorption.
例如，因为突变的基因可以提高铁的吸收效率，所以遗传性血色素沉着病突变可以保护带菌者不缺铁。
2
The redhead sprang from a mutatedgene in Europe thousands of years ago.
几千年前的欧洲，红头发的人因为基因变异的关系凭空出现。
3
But keep in mind that the scientists say this mutatedgene may be rare.