We dont have giant teeth change in dentition full

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  • PSYCH 3228
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Human Heredity: Principles and Issues
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Chapter 6 / Exercise 20
Human Heredity: Principles and Issues
Cummings
Expert Verified
We don’t have giant teeth – change in dentition Full fossil record of hominins oGood tracking of these changes The Hominins
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Human Heredity: Principles and Issues
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Chapter 6 / Exercise 20
Human Heredity: Principles and Issues
Cummings
Expert Verified
Australopiths – before we get to homo oTwo different lineages oRobust (big and burly) and gracile (more fine)Homo oEarly and late Australopiths Early fossil evidence for a robust and gracile species – 1920s – 30s 1970s discovery of “Lucy”oparts of skull and jaw – important for looking at the change opart of pelvis and hip joint – transitions can be tracked ocan see if the australopith is bipedal 5-2 MYA several speciesodivided among robust and lighter formsFull bipedalism preceded large brains – but not the full size – bipedalism came before large brains forest versus savannah living unclear – unsure where they lived Early Homo discovery of early homo in conjunction with stone tool manufacture in olduvai gorge ohomo habilis “handy man” – defining feature of homo species is using stone toolsolarge brain size, smaller teeth – homo habilis is the one for our purposes of tracking out upbringing – gave rise to us opotential second early Homo species “rudolfensis” with larger teeth Later Homo about 1.8 MYA emergence of even larger brained species (Homo erectus/ergaster) in Africaabout 0.8 MYA expanded range and colonized much of Europe and Asiamodern Humans arrive approx. 0.2 MYAHomo ergaster & Homo erectus transition to larger brain and smaller teeth Homo ergaster existed ~ 2 MYA to about 1.3 MYAH. erectus existed until as recently as ~100,000 years ago– existed on earth as recently as 100,000 years ago – coexisted with modern humans oabout as large as modern humans, probably hunter/ scavenger and gatherermigrated across most of Africa, Europe and Asia – other homo species that moved along the globe othere were species that behaved similarly to us and looked similar that existed Homo heidelbergensis
“Heidelberg Man” ~600k through 200k years agomore meat consumption, larger brainstransition to more hunting than scavengingevidence of organized hunting of large prey and butcheringorganized hunting and more complex butchering – seeing an increase in brain size and increased complexity when it comes to hunting and foraging look at slideshow diagram – NeanderthalHomo Neanderthalis distinct species contemporary with homo sapiensspread across Europe and west asia – not just in Africa larger build that sapiens large occipital lobe – defined eyebrow Modern Humans PIC IN SLIDESHOW Multiregional hypothesis proposes that homoerectus left Africa distributed around the globe and then through interbreeding evolved to homosapiens Ancestor of humans left Africa – then humans evolved in multiple regions simultaneously around the clobe Single origin – ancestral humans were in Africa Multiregional Hypothesis widespread erectuspopulations diverged to giverise to more modern Homoforms

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