UC Berkeley
Image Caption
In the real world, many, many loci affect the fitness of a population and an adaptive landscape may have multiple peaks and valleys. This graph shows a complex landscape involving just two loci.
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This image is part of a series:
Genetic drift example (1 of 4)
BB individuals have big beaks, Bb individuals have medium-sized beaks, and bb individuals have small beaks. These birds live in a place where large and small seeds are abundant, but…
Genetic drift example (2 of 4)
Now imagine a small population of all small-beaked individuals (all bb genotypes). They have a high fitness (they are at a local peak), but not as high as a population…