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Unformatted text preview: 11-27-06 Homo sapiens
130 kybp-present o based on fossil evidence 1300cc average Klasies River Cave, South Africa- oldest fossil found Multiregional Model
African origin Gene Flow Parallel Evolution between species Hybrid Model
interbreeding between species African Origin Model
African Adam o 180 kybp o Y chromosome o Lemba African Eve o 125 kybp o Mitochondrial DNA - Mitochondrial DNA
only inherited from the mother mutates faster than nuclear DNA o lacks repair enzymes studied in several different human populations greatest diversity found in African population o Therefore the oldest population molecular clock Mitochondrial Eve
mother of all humans she may have lived about 200,000 years ago in Africa Native American Origin
4 rare mtDNA haplotypes are found in Native Americans the same haplotypes are found in Mongolia and China Secular Trends
trends in growth or morphological characteristics attributable to changing environmental factors o nutrition o disease not genetic adaptation - ...
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- Fall '03