tag:blogger.com,1999:blog-452470104476343114.post448702216960765677..comments2023-10-16T21:43:30.546+08:00Comments on 小城科學: 古人怎樣出非洲?Unknownnoreply@blogger.comBlogger2125tag:blogger.com,1999:blog-452470104476343114.post-91442755971453787472010-01-13T17:17:54.964+08:002010-01-13T17:17:54.964+08:00事實上,只有一位 founder 這情況是有點意想不到,表示踏出非洲那段路程十分艱巨,只有一少撮成功...事實上,只有一位 founder 這情況是有點意想不到,表示踏出非洲那段路程十分艱巨,只有一少撮成功,正如一些學者所言(斜體由我加):<br /><br />The group leaving Africa must have been very small, given that only that L3 type survived. By comparison, <i>no modern African tribe contains only one mtDNA type</i>, and the same is true of non-African tribes, with the arguable exception of some Polynesian islanders.<br /><br />(source: Peter Forster, 2004, Ice Ages and the mitochondrial DNA chronology of human dispersals: a review)<br />(註:mtDNA 即粒線體基因)<br /><br />A single founder picture is <i>not seen in any other continent-to-continent colonisation</i>. For instance, the colonisation of the Americas involved five founder mtDNA lineages, while New Guinea and Australia have, between them, over a dozen founders.<br /><br />(source: Stephen Oppenheimer, 2009, The great arc of dispersal of modern humans: Africa to Australia)Nick Leehttps://www.blogger.com/profile/01716009308060313250noreply@blogger.comtag:blogger.com,1999:blog-452470104476343114.post-87392577860926618252010-01-13T15:16:11.148+08:002010-01-13T15:16:11.148+08:00相信在遷移時,族群中必然有一兩個是較為進取和特別出眾的人作為領袖,否則不會冒這麼大的險走到一個仍未開...相信在遷移時,族群中必然有一兩個是較為進取和特別出眾的人作為領袖,否則不會冒這麼大的險走到一個仍未開發的地方。Terence Yunhttps://www.blogger.com/profile/07434962937499120315noreply@blogger.com