Now, three researchers at the University of Pennsylvania, Alexander Platt, Daniel N. Harris, and Sarah Tishkoff, have done the converse analysis: examining the X chromosomes of the handful of completed Neanderthal genomes we have. It turns out there's also a strong bias toward modern human sequences there, as well, and the authors interpret that as selective mating, with Neanderthal males showing a strong preference for modern human females and their descendants.
3 Strictly speaking, the slope is continuous everywhere except for the data points themselves. ↑
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"trace": [，更多细节参见WPS官方版本下载
In less than 25 years this will rise to more than half of the rail network being at risk, according to the government's own figures.
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