When a brightly colored guppy population is placed in an area containing many predators, the population changes in only a few generations to one containing only guppies with drab, dull colors that blend into their environment. This is an example of how natural selection can

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This scenario is a classic example of natural selection where the prevalence of predators creates an environment where the guppies that are better able to camouflage themselves (i.e. those with drab colors that blend into their environment) are more likely to survive and reproduce. Over time, this leads to a shift in the population towards guppies with duller colors that are better suited to their environment. Natural selection thus improves the match between guppies and their environment. There is no evidence to suggest that new color mutations or conversions between dominant and recessive alleles are involved in this process, nor does this scenario provide any indication that female guppy color preferences have changed.

When a Brightly Colored Guppy Population Is Placed in an Area