class_10_2010_for_web

class_10_2010_for_web - IB35 Human Biological Variation...

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1 IB35 Human Biological Variation Class #10 Topics for today: Genetics: Comparing variation Something to think about: • Why don’t we see older coalescences? • What are the implications of these models? • HOT NEW RESEARCH… – Nuclear DNA shows that the Neanderthal sequence has a closer relationship to a human Han Chinese, a Papua New Guinean, and a French sequence than to Western or Southern African sequences. DNA Testing • Forensics – Identification of victims – Documenting presence at a crime scene • Other times you might need to know Curiosity – Curiosity – Figuring out who your relatives are/were – Medical • Diagnose a genetic disorder • Warn of a predisposition • Warn of chances of passing on a genetic disorder • Indicate effectiveness of some drugs The Four Forces of Evolution: • Mutation Mutation – (the only source of (the only source of newnew variation) • Selection Selection – (acts to diverge populations (acts to diverge populations directionally ) (acts to diverge populations • Drift Drift – (acts to diverge populations (acts to diverge populations randomly )
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class_10_2010_for_web - IB35 Human Biological Variation...

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