Psychology 3228 Lecture Notes - Lecture 3: Peppered Moth, Homo Sapiens, Homo Floresiensis

• School: Western University
• Department: Psychology
• Course: Psychology 3228
• Professor: Scott Mac Dougall- Shackleton

Document Summary

Multi-regional hypothesis: spread out from africa and asia - parallel evolution vs. Single origin out of africa hypothesis (much better supported): species replace one another. Early dna (mitochondria) showed no evidence for interbreeding. More recently, genetic evidence shows that homo sapiens and. More common of those who are of non-african descent: homo floresiensis (2003) Recent discovery of fossils in indonesia (hominim bones) Ho(cid:373)i(cid:374)i(cid:373) (cid:449)ith (cid:448)ery s(cid:373)all (cid:271)ody a(cid:374)d (cid:271)rai(cid:374) (cid:894)(cid:374)i(cid:272)k(cid:374)a(cid:373)ed (cid:862)ho(cid:271)(cid:271)it(cid:863)(cid:895) Species went extinct 12 thousand years ago. We do not know if there was any interbreeding. New branch that we did not know about until very recently: denisova hominims (2008) Last common ancestor of homo sapiens and neanderthals about a million years ago last common ancestor with sapiens and neanderthals about 1 mya. Likely migrated out of africa between erectus and modern migrations. Genetic evidence that they were interbreeding with people homo sapiens (dna in melanesians, indigenous peoples, and se asia populations)