Tag: selection
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Case Study: How Did the Guppy Get His Color?
This case study examines evolution in guppies as evidenced by color variation in populations. It is based on an iconic study performed by John Endler where he collected data on guppies by scoring the size, number, and brightness of spots. Students progress though the slides (lecture and discussion), and examine details of Endler’s study, such as where…
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Investigation: Habitat Selection in Flour Beetles
This activity was modified from an Advanced Placement Investigation for use with freshman classes. The instructions are clear and require students to examine data and create a graph. Then students collect their own data using Choice Chambers and can choose which variables they would like to test: wet vs dry, water vs vinegar, light…
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Evolution and the Rock Pocket Mouse (HHMI)
This activity was modified from the HHMI Activity on color variation in the rock pocket mouse which illustrates evolutionary concepts such as fitness, natural selection, and mutation.
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Investigation: What Factors Influence Evolution
Explore the relationship between mutation, selection strength and the rate of evolution by using a simulation, which shows how a population evolves.
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Stickleback Fish – An Evolution Story
Students to examine two lakes and compare the types of fish in each. They learn how lakes form, and why spines may be an advantage for some populations.