Biology 1001A Lecture Notes - Lecture 19: Synapomorphy, Symplesiomorphy, Evolutionary Taxonomy
26 May 2016
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Document Summary
Phylogeny: a description of the evolutionary relationships between living things, which can be represented by a tree (branching, nodes, tips) You can connect all living things, no matter how far back it dates (the most recent common ancestor of two living things) + time moves from the roots to the tips. + branching points )rendezvous points) represent speciation points, where two species share a mrca. + all kind of shapes and structures, but the branching order will be the same (so long as you move from base to tip). + some phylogenies convey more information than branching order (although we don"t have to worry about it). + can spin around nodes, but the sequence of branching events may still be the same. Horizontal base may reverse order of base so one is farther down. Doesn"t matter if humans and birds on left or right. What we care about is that the closest relative to humans are birds, for example.
