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174-178 - LAB CHAPTER 9 MIOCENE HOMINID EVOLUTION pg...

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LAB CHAPTER 9: MIOCENE HOMINID EVOLUTION--- pg. 175-184 OBJECTIVES Miocene : epoch during which the ape and human lineages diverged Hominoid : lesser apes, great apes, humans Hominid : human-like: Australopithecus, Homo (of the traditional taxonomy) THE BIOMOLECULAR DATA --The basic premise in BM analyses of the phylogenetic relationships of organisms is that the closer organisms are biochemically and genetically, the more closely they are related. Techniques : immunodiffusion, DNA hybridization, DNA and amino acid sequencing --Data shows: Cercopithecoidea branched off before the living apes diverged. --Among the hominoids, gibbons branched 1 st , orangutans next --Support of view that African apes more closely related to humans than are any other primates --Form a clade, sharing the derived characters of similar proteins and DNA --Humans and chimps should be in the same genus ( Homo ) w/ two subgenera: Pan and Homo THE MOLECULAR CLOCK --Branching sequences dates of separation of taxa have been estimated
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