BIOLOGY 1M03 Lecture Notes - Lecture 18: Neanderthal Extinction, Neanderthal, Neanderthal Genome Project
14 Mar 2017
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Document Summary
What makes us human: recent out africa vs multiregional evolution hypothesis, did gene flow occur between humans and other hominins. Recent out of africa: humans come from africa, replaced homo erectus and neanderthals without interbreeding, explains distribution of fossils, that"s wrong. Multiregional distribution: explains distribution of fossil, continuous exchange of genes, evolved to modern humans, some modern asians have similarly shaped incisors, but it can simply be convergent evolution. Homo florencis: dwarf species from flores island, indonesia, 3 feet tall, tiny (chimp-like) brains, 14000-6000mya, some think that they are related to homo erectus, and evolved different characteristics due to natural selection. Insular dwarfism - small size is advantageous for reproductions: alternatively, they are like modern humans only sick - but that"s wrong, evolves on islands, sometimes, gigantisms is observed as well, because some species must become predators. Neanderthals: they were around 400000 ya in asia, but lived in europe, western aisa, and southern.
