Wallace Effect

Wallace Effect is a honorific term that relates reinforcement to Alfred Russel Wallace, the co-inventor—if not the original creator himself—of the theory of evolution by natural selection. The concept of reinforcement explains sympatric speciation by enhancing reproductive isolation.

Gene Flow

Gene Flow describes the movement of genetic markers within a population or between different populations. By the detection of transposons gene flow among different species became feasible. The term gene flow is erroneous as in fact rarely genes but different alleles of a gene are considered, but despite this flaw it is common convention to use gene flow, and so will we in most cases throughout this site.