Biology / Bio 1813 · Procedure · 60–90 seconds
Building a Phylogenetic Tree from Shared Derived Characters
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This procedure builds one small phylogenetic tree from a table of shared traits, applying homology, clade structure, and maximum parsimony together.
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Counting a trait's presence across species is only the first step — sorting which traits are shared-derived versus shared-ancestral for this particular group is what actually builds the tree's structure.