Let p be the probability that a pair of individuals "randomly" chosen from different populations is genetically more similarty than an independent pair chosen from any single population. We compute all possible pairwise genetic distances, classify then as within- or between- population distance (the sets d_w and d_b, respectively), and then calculate the frequency with which d_w>d_b. 这段话是节录自一篇利用基因来探讨族群之内和之间的差异.. 然而我不了解的是这里的randomly的意思是啥?? 是说随意从族群A抽一个人..然後再从族群B抽一个人.. 根据这两个人的基因作比较...得到一个d_b 那麽如果根据这样的想法..d_w是从同一个族群抽两个人出来 然後比较二者的基因差异吗?? 这样的说法又好像怪怪地... 想请问板上是否有人可以解释这段话的意思??? 谢谢.... --

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