In this scenario, the deleterious allele will remain at an intermediate equilibrium frequency that reflects the balance between gene flow and natural selection. The common conception of evolution ...

For over a thousand years, the story of human evolution was simple: Homo sapiens developed in Africa between 200,000 and ...

A chromosome glitch in beetleweed reveals how genome doubling can drive rapid plant evolution and create new species in real ...

Those infected cells flow through the spleen, which culls them out because of their sickle shape -- and the parasite is eliminated along with them. Scientists believe the sickle cell gene appeared ...

In fact, the ability to digest lactose may be an example of adaptive evolution in the human lineage ... In fact, researchers have identified many genetic loci at which selection has likely ...