Darwinian Snails

Lab (Tutorial): Darwinian Snails

This tutorial-style lab investigates the requirements for evolution by natural selection using an engaging simulation of crab predation on snails. Students are able to manipulate the snail population to sequentially "turn off" variation, heritability, and differential survival based on shell thickness to investigate the importance of each of these factors. The module can be packaged with an optional open-ended extension activity called Experimenting with Snails (see separate description).

Level: Intro
Key Concepts: Experimental Design; Genetic Variation; Heritability; Natural Selection
Courses: Evolution; Intro Bio: Eco/Evo/Genetics; Intro Bio: Non-majors; Marine Biology

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