5. How Selection Changes the Genetic Composition of Population

Principles of Evolution, Ecology and Behavior (EEB 122)

Genetics controls evolution. There are four major genetic systems, which are combinations of sexual/asexual and haploid/diploid. In all genetic systems, adaptive genetic change tends to start out slow, accelerate in the middle, and occur slowly at the end. Asexual haploids can change the fastest, while sexual diploids usually change the slowest. Gene frequencies in large populations only change if the population undergoes selection.

00:00 - Chapter 1. Introduction
05:45 - Chapter 2. History of Genetics
10:57 - Chapter 3. Different Genetic Systems
20:45 - Chapter 4. Math of Genetics
40:42 - Chapter 5. Rates of Change in Different Genetic Types

Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses

This course was recorded in Spring 2009.