Human Evolution Flashcards
Modern humans appeared ..
In Ethiopia 200kya
4 species of recognised Homos:
Sapiens Erectus Heidelbergensis Neanderthalensis Habilis is debated
2 models of evolution:
Out of Africa (replacement)
Multi region
Nuclear DNA supports replacement model because:
Greater allergic diversity in African population but each region shows a subset of the alleles from the region below
MtDNA supports replacement model because:
Phylogenetic analysis
Which 2 homos share common ancestor from 800kya?
Neanderthals and modern humans
Interbreeding apparent between Neanderthal and modern humans because
More genetic variation shared with Eurasian than sub Saharan Africans
2 forms of archaic homonid:
Eastern denisova
Western Neanderthal
Replacement model with interbreeding is supported by evidence:
Neanderthal with modern human and 1 group with denisovians on way to melonasia
New model is:
“Leaky” replacement model