In simplest terms, evolution can be defined as a change in allele frequency over time. A fact of nature is that allele frequencies for any given gene are always in a state of flux and for that reason evolution is a fact of nature. At the same time we have theories that help us explain why allele frequencies change in the first place. We call these evolutionary theories and for this section we explored two of these theories…natural selection and genetic drift.

The purpose of this discussion board is meant for you to share any ideas or to demystify any difficulties that you may have about evolutionary theory. Feel free to share your thoughts in an open ended but informed way! For your contribution you will receive participation points.