EVERYDAY SCIENCE

Detailed explanation-1: -Evolution by gene flow (migration) makes two different populations more similar to each other. Two different populations are often subject to different selective pressures and genetic drift, so they would be expected to have different allele frequencies.

Detailed explanation-2: -Gene flow is the movement of genes into or out of a population. Such movement may be due to migration of individual organisms that reproduce in their new populations, or to the movement of gametes (e.g., as a consequence of pollen transfer among plants).

Detailed explanation-3: -Gene Flow. Another important evolutionary force is gene flow, or the flow of alleles in and out of a population resulting from the migration of individuals (Figure 5).

Detailed explanation-4: -Modern Theories of Evolution: Gene Flow. Evolution can also occur as a result of genes being transferred from one population to another. This gene flow occurs when there is migration. The loss or addition of people can easily change gene pool frequencies even if there are no other evolutionary mechanisms operating.

Detailed explanation-5: -Another mechanism of evolution may occur during the migration of individuals from one group or location to another. When the migrating individuals interbreed with the new population, they contribute their genes to the gene pool of the local population. This establishes gene flow in the population.