Some researchers proposed that the lack of variation in our maternally inherited mitochondrial DNA suggested these bottlenecks took place as our ancestors spread out of Africa relatively recently.

有些科学家提出，我们从母体遗传来的线粒体DNA很少发生变异，说明瓶颈发生在不久以前祖先走出非洲的时候。

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Methods The mutation of mitochondrial DNA from all 18 family members of a chinese pedigree with maternally inherited aminoglycoside antibiotic-induced deafness was detected by PCR and DNA sequencing.

方法应用PCR和DNA序列分析技术，对一个有明确氨基糖苷类抗生素应用史的母系遗传耳聋家系共18人（包括聋人和听力正常者）的线粒体DNA进行研究。

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