BIO153H5 Study Guide - Cellular Respiration, Paralytic Shellfish Poisoning, Photosynth
Document Summary
Phylogeny: evolutionary history of a group of orgs. Phylogenetic tree: shows the ancestor-descendant relationships among pops or species, clarifies who is related to whom. Node/fork: pt where 2 branches diverge ; reps pt in time when an ancestral group slit into 2 or more descendant groups. Tip/terminal node: endpt of a branch ; reps group (species of larger taxon) living today or one that ended in extinction. Based on computing a statistic that summarizes overall similarity among pops, based on data i. e. using gene sequences to compute an overall genetic distance. Genetic distance summarizes avg percentage of vases in a dna sequence that differ bt 2 pops. Computer program build a tree that clusters most similar pops and places more divergent pops on distant branches. Based on realization that relationships among species can be reconstructed by identifying shared derived characteristics.
