"We're trying to prevent kids being born with fatal diseases." Mitochondrial DNA is passed down only through the femaleline.
“我们一直在努力防止孩子一出生就带有致命的疾病”，线粒体dna只是通过母体遗传。
2
Levels of mitochondrial DNA - a female genetic marker only carried down the femaleline - is similar all along the coast, regardless of language.
不管语言，沿海岸线的线粒体dna的层级——一个女性基因标记只携带了女性线链——是相似的。
3
The team made a first breakthrough last year by using mammoth hair to extract mitochondrial DNA, genetic material that is inherited from the femaleline.