ANTH 101 Lecture Notes - Lecture 15: Homo Sapiens, Homo Erectus, Nuclear Dna
Document Summary
First homo sapiens: homo sapien sapien. Modern traits, and some lingering ancestral traits: 200 kya, smaller, yet prominent brow ridge, occipital bun, herto skull. Only species left, why: three theories. African replacement model: modern humans emerges as new species splitting off from heidelbergensis around 200 cya, spread throughout the new world, creates a competition as they spread, replaced pre-existing homo populations outside of africa. Multi-regional evolutionary model: homo erectus gave rise to heidelbergensis, neanderthal, and sapien. All variations of the same species: interbreed possible between populations. Thursday, november 19, 2015: modern humans arise through gene ow, dna says . In the past, only physical traits to go off. Then, able to extract mitochondrial dna from neanderthals: looking at the dna shows that there are no similarities between modern day people and neanderthals. But mitochondrial dna may not be enough to support that.
