Unit 4: Evolution of Populations Now that you have had an opportunity to see simulations of natural selection, you will be able to delve deeper into the topic by examining the ways in which alleles and allele frequencies, along with population sizes, are affected by various selection pressures.
Unit 4 Time Advisory
This unit should take you approximately 1.5 hours to complete.
Unit4 Learning Outcomes
Upon successful completion of this unit, the student will be able to:
- Discuss how natural selection occurs on a population level. - List the factors that influence how, and how quickly, selection pressures affect populations, and design experiments to test those factors’ influence.
- Interactive Lab: McGraw Hill’s Virtual Labs: “Natural Selection”
Link: McGraw Hill’s Virtual Labs: “Natural
Instructions: This simulator will permit you to alter allele frequencies and observe their change over many generations under various environmental conditions. Read the introduction and instructions on the left side of the page (scroll down to read all). Run the simulator once using the pre-set options for environment and allele frequency; then run the simulator three more times with different environments and/or allele frequencies of your choice. Before beginning the simulations, look over the questions in the Journal tab at the bottom of the screen; then choose your simulations with those questions in mind.