Discussion Board: Evolution in the News

Introduction

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 evolutionary theories that help us explain why allele frequencies change in the first place. For this section we will explore these evolutionary mechanisms.

WHAT YOU ARE DOING.

The purpose of this discussion board is meant for you to share an article or a news story that specifically deals with how evolutionary mechanisms are shaping nature around us. For this discussion board you can only use the following evolutionary forces: Natural selection, sexual selection and gene flow.

WHAT YOU HAVE TO DO FOR POINTS.

  1. Give a short summary of what you read.
  2. State the evolutionary mechanism involved and explain how that evolutionary mechanism is working to transform the population in question.
  3. Lastly, you will have to give an explanation of what is promoting the evolutionary change in the first place.
    1. For example, a bacteria will evolve resistance to antibiotics if antibiotics are always present. In the absence of antibiotics, bacteria will have no need to evolve resistance to antibiotics. Its the excessive use of antibiotics that is selecting for bacterial genes that enhance a bacteria’s level of fitness.
  4. You will have to respond to two other student posts.
  5. Make sure you cite your work so that others can follow the news article.

GRADING RUBRIC

Click on the “Gear icon” located in the top right-hand corner and then click on “Show Rubric” to view the grading requirements for this discussion.

TIPS FOR SUCCESS

  • Please keep your answer to only what is asked in the assignment.
  • I recommend composing your content offline in a text editor and then copy and paste the text into your reply post. If something happens you will have an offline copy of all of your hard work!
  • I highly recommend using Google Docs (Drive) to compose offline, as Google plays well with web-based forums. If you are using Microsoft Word to compose offline, you may need to do some editing to the format when you paste it into the reply.

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