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Unformatted text preview: grouping Cladograms Polyphyletic grouping Building Cladograms Assemble a table of character states Biological Classification Heyer 2 Building Cladograms Major assumptions : 1. The group of organisms is monophyletic 2. The outgroup (used for comparison) is closely related to, but separate from your group 3. You can tell which character states are homologous or analogous. Building Cladograms Each bifurcation of the branch is based upon the state (presence/absence) of an apomorphic character Cladograms Cladograms are made by determining the sequence of evolution of shared derived characters Rule of Parsimony: The simplest explanation is the most likely explanation. Cladograms Base change event Cladograms Rule of Parsimony: The simplest explanation is the most likely explanation. Cladograms But not always! Rule of Parsimony: The simplest explanation is the most likely explanation....
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- Fall '10
- Cladistics, Biological classification, Phylogenetics, cladograms, clade, Heyer