BIO 201 Study Guide - Final Guide: Data Matrix, Coronavirus, Model Organism
22 Mar 2017
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Document Summary
A visual representation of the genealogical relationships of life (i. e. - a family tree) A conceptual model: integrating observations and inferences in order to help simplify and understand a complex system. A pattern of relationships representing what (but now why : the 2 major types of patters shown in phylogenies, lineage splitting. Speciation causes lineage splitting: evolution of new traits. Evolutionary processes produce phylogenetic patterns (processes patterns: disease phylogenies. Hiv: virus transferred from simian (primates) to humans. Sars: pathogen was a coronavirus: phylogenetic concepts. Characters: any observable feature (or part) of the organism. Characters = the data we"ll use to perform analyses. Good characters: show greater variation among taxa interested in than within each taxon; variation is heritable and independent of other characters. Character states (conditions): describing the variation we observe in our characters e. g. - eye color = character, character state = blue, green, brown, etc. Character states are the conditions in which characters occur.
