But the Y chromosomes differ in 30 percent of their DNA, meaning that these chromosomes are changing far faster in both species than the rest of the genome.

但是在Y染色体上却存在30%的DNA差别，这意味着两个物种的Y染色体比其它基因组变化得更快。

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The team sequenced the same piece of DNA - 10,000,000 or so letters or 'nucleotides' from the Y chromosome - from two men separated by 13 generations, and counted the number of differences.

这个小组以相隔了13代的两个男性为测试对象，在其Y染色体相同区域上选取长约10， 000， 000核苷酸片段进行了测序，并计算了两者之间的差异。

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Y chromosome is another focus of human evolutionary studies after mitochondrial DNA, which has also approved the "out of Africa" hypothesis.

染色体是继线粒体之后的研究人类进化的又一热点，通过对其上的多态性位点研究也证实了非洲起源说。

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Instead, to judge by the most comprehensive study on the reliability of forensic evidence to date, the error rate is more than 10% in five categories of analysis, including fiber, paint and body fluids. (Meaning: When the expert says specimen X matches source Y, there's a 10% probability he's wrong.) DNA and fingerprints are more reliable but still not foolproof.

FORBES: Forensic evidence doesn't always tell the truth.