What are ways species exchange genes with each other? Hybridization and gene flow are shortcuts to biodiversity that don’t always involve differentiation. By continuing to study hybridizing ...

Aa Aa Aa Natural selection, genetic drift, and gene flow are the mechanisms that cause changes in allele frequencies over time. When one or more of these forces are acting in a population ...

Under normal conditions, genes in a given population are exchanged through breeding, so that even if some variation occurs, it is limited by this "gene flow." But gene flow is interrupted if the ...

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 ...