Speciation and adaptation arise from the dynamic interplay of genetic variation, natural selection, genetic drift and gene flow. Divergence between populations often begins with ecological or ...

Eastern Pennsylvania is home to beautiful farmlands and countryside, but it's also a gold mine of information for geneticists, who have studied the region's Amish culture for decades. Because of their ...

Introduction. Definition of natural selection ; Relationship to genetic drift and evolution ; Restricted meanings of "natural selection" ; Modes of selection ; Summary -- Philosophical comments.

When species are subjected to changing environments, they can survive in their current location through genetic adaptation.