BIO207H5 Study Guide - Comprehensive Midterm Guide: Sickle-Cell Disease, Robertsonian Translocation, Chromosomal Inversion

211 views16 pages
6 Feb 2017
School
Department
Course
Professor

Document Summary

Chapter one: describe the molecular basis of evolution. Assessment of genetic similarities and differences between species, explore the relationship of modern organisms to one another and to their extinct ancestors. It is evident that they are connected through dna. Darkins "" river through time"" connects all organisms from past to present, shared dna is the basis for identifying and studying relationships between organisms and tracing their history: identify ancestral relationships based on phylogenetic trees. Morphological or molecular similarities and differences identifying the evolutionary relationships of ancestors and descendants can be depicted in a phylogenetic tree. Summarizes evolutionary histories of populations or species using branch points in the tree to indicate the common ancestors of the descendent. Cladistic approach: reconstructs evolutionary relationships and assorts them into groups called clades based on the identification of shared derived characteristics that can be either morphological or molecular. Monophyletic group: includes common ancestor and all its descendents.