Evolutionary Biology BIOL 3350 Dr Lisa Rapaport Lecture 14 Part 2 Notes Reconstructing Evolutionary Histories I II III IV Issues in Phylogenetic Reconstruction A Need to be specific when choosing a character claws are not really a good choice because there are many different types of claws and some traits like long nails resemble claws but are not actually claws B You have to make judgments as to whether a trait is secondarily lost or if it evolved independently Molecule Phylogenetics A Many of the traits that we thought were neutral mutations are now being seen as not so neutral Phylogeography Uses A We use phylogenies to figure out how species fill an ecological space B Cryptic species look the same but are different genetically DNA and Salamanders A DNA analysis segregate these different species and subspecies B They all look the same but are genetically different C Phylogeographic patterns help us understand speciation 1
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