Intro | Discovery | Hypotheses | Simulation 1 | Analysis 1 | Simulation 2 | Analysis 2 | Conclusion | Gallery

Consider some possible hypotheses:

1. Predators are causing guppy populations to become more drab by preying on the most brightly colored individuals and eliminating them from the gene pool.
2. Guppy populations are evolving to more closely match -- or stand out from -- their environment.
3. Female guppies are choosing to mate with the most brightly colored males, giving those males a higher probability of passing their genes on to the next generation.

Maybe you have a different hypothesis.

-> Check out a few simulations to see how scientists like John Endler test their hypotheses.

Intro | Discovery | Hypotheses | Simulation 1 | Analysis 1 | Simulation 2 | Analysis 2 | Conclusion | Gallery