BIS 2C Lecture 4: BIS 2C Lecture 4

• School: UC-Davis
• Department: Biological Sciences
• Course: BIS 2C
• Professor: Joel Ledford

Document Summary

Remember sister taxa are united by a node. So the character that defines aminotes as a group is the amnion. Tetrapod limbs is an ancestral feature (not a derived feature). Tetrapod limbs would be a synapomorphy for tetrapods (another monophyletic group). Branch lengths are a measure of change/mutation so b . So far, we have worked with known phylogenies ; what happens when we need to build a tree from scratch? biology, ecology, animal behavior, statistics, and computer science. Building phylogenies is a science in itself; combining knowledge from fields such as molecular. The phylogenetic history of a group of organisms is inferred from their characters. We need to collect data from our taxa; morphology, genetics, and behavior are most commonly used. Trees are hypotheses that can be tested by adding more data, taxa, or using different analytical. Most biologists are consumers of phylogenies; they use the result of phylogenetic analyses to inform methods . their research.