What is gene flow?

Gene flow refers to the transfer of genetic material between populations of the same species, allowing for the exchange of alleles. This process is crucial for maintaining genetic diversity within populations and can enhance their adaptability to changing environments. When individuals from one population migrate to another, they introduce new genetic variations that can alter the genetic makeup of the receiving population.

In contrast to other concepts, option A describes interspecies genetic transfer, which is not typically classified as gene flow within the same species. Option B pertains to the concept of evolution and natural selection but does not specifically define the movement of genes between populations. Option D addresses genetic mutations, which are changes within a gene rather than the movement of genes between populations. Thus, the correct characterization of gene flow emphasizes its role in the exchange of genetic material across populations within the same species, which contributes to evolutionary processes and population dynamics.