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Unformatted text preview: Asia=rice, citrus. Plants were modified a lot more than animals as a result of domestication. Human evolution How do we know the extent that we are related to other species? Fossil, but mostly from molecular data, DNA. Fragment DNA--Single stranded DNA from one species, single stranded DNA from another species, test it and the extent of which the fragments pair. Humans and chimpanzees=1.2% of difference. The more similar we are to another specie, the more recent the common ancestor. DNA is clockwise; species become more different (divergent) as time progresses. Almost like genetic drift over time. Amino acid sequence in shared proteins is another way to rest relatedness. Hemoglobin changes. Phylogenetic tree: 60mya earliest primate evolution is not predictive...
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- Fall '08