Lecture 23 Outline of Last Lecture I. Neandertals Outline of Current Lecture II. Origins of Modern HumansA. HypothesesCurrent LectureOut of Africa hypothesis:Homo sapiens is a young species that came out of AfricaOther hypothesis:Original population was in AfricaBig population crash - extremely small population Anthro 1031st editionLost a lot of genetic diversityGenetic drift - bottleneckFounder population for the rest of Homo sapiensExplains why humans are genetically very similarThere is almost no Neandertal DNA in contemporary AfricaSubset leaves Africa and meets subset that left Africa earlier (Neander-tals)Intermingle with Neandertals so subset that left Africa now has mixed DNAThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Homo sapiens in Africa never left and interacted with Neandertals so there isn't Neandertal DNAGenetic diversity today is greatest in AfricaOrigins of Modern Humans:Modern genes, anatomy, and culture appeared in Africa firstAlmost extinct - small populationModern populations diversify in AfricaOne small modern population left in Africa'Replaced' earlier hominin populations...with modest gene flow between(Weren't really replaced, were assimilated - we have Neandertal
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