BIOL SCI 150 Lecture Notes - Lecture 18: Neolithic, Homo Heidelbergensis, Homo Erectus
14 Mar 2018
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Document Summary
Hmo species have moved out of africa 3 times: homo erectus 1. 8 million years ago, homo heidelbergensis 600,000 years ago (potentially the common ancestor of neanderthals and denisovans, modern humans 100,000 years ago. Mitochondria dna sequences can be used to determine human maternal lineages. Lineages trace back to a mitochondrial eve who lived in east africa approximately 200,000 years ago. Modern humans had two migration sout of africa. N mitochondria haplogroup gave rise to populations in europe and asia. M mitochondria haplogroup gave rise to populations in asia. We can understand the relationship between humans and neanderthals and denisovans by isolating dna from ancient bone fragments and sequence that material and compare it w/ dna of contemporary humans. Key issue: prevent contamination with modern human dna. How to protect against this: wear gloves; researchers sequence their own. Mtdna and compare it to the sample so they can tell if they"ve contaminated it.
