BIO153H5 Lecture Notes - Lecture 9: Phylogenetic Tree, Allele Frequency, Myoglobin
Document Summary
The root could be essentially drawn anywhere on an unrooted tree. Wolves and badgers are more loosely related with one another than to leopards. No main or side branches (each branch is equally as important) No direction for evolution (no one direction to take to become more evolved ) Don"t count nodes (could add or take away species from the tree so counting nodes is not a useful tool cause that method doesn"t remain constant) Colours- codes branches by diversification rate (speed of evolution) Myoglobin is analogous to hemoglobin in muscle- regulates how much oxygen can be absorbed and so how deep one can dive; mapped onto phylogenetic tree (colour coded) Rooted trees- common ancestor to all organisms on tree, has evolutionary starting point. Un-rooted tree- can convert from rooted, cannot tell how organisms related to each other at root , can draw root at any point.
