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Unformatted text preview: independently in two species. orthologous genes Homologous genes that are found in different species because of speciation. paralogous genes Homologous genes that are found in the same genome as a result of gene duplication. Binomial The two-part latinized name of a species, consisting of the genus and specific epithet. PhyloCode System of classification of organisms based on evolutionary relationships: Only groups that include a common ancestor and all of its descendents are named. phylogenetic bracketing An approach in which features shared by two groups of organisms are predicted (by parsimony) to be present in their common ancestor and all of its descendants. Polytomy (puh-lit-uh-me) In a phylogenetic tree, a branch point from which more than two descendant taxa emerge. A polytomy indicates that the evolutionary relationships among the descendant taxa are not yet clear....
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- Spring '10