BIOLOGY 1M03 Lecture Notes - Lecture 18: Multiregional Origin Of Modern Humans, Homo Ergaster, Homo Heidelbergensis
4 Feb 2018
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Gene flow between amh and other hominins. Practice question: please draw phylogenetic relationships among these species: know. Recent out of africa hypothesis vs. multiregional hypothesis. For decades, there were multiple interpretations of recent human evolution but pretty much all of them were wrong. Proposes that modern humans dispersed out of africa and replaced populations of h. erectus and neanderthals without interbreeding (no gene flow) called complete replacement. H. ergaster then evolved into h. heidelbergensis which then diversified into h. neanderthals and h. sapiens in africa. H. sapiens ancestor then diversified out of africa relatively recently. Humans emerged from an african ancestor (~50,000 years ago) Proposes that evolution of modern humans has been occurring since early humans (h. erectus) left africa 2 mya. Continuous exchange of genes among populations in different regions united this species as it evolved into modern humans. One species that maintains gene flow within the populations. Me is supported by primitive characteristics in some modern races.
