Respuesta :
Allopatric speciation typically occurs in two stages. the first stage is the geographic separation of two populations and the second stage is reproductive isolation.
Topographical speciation, also known as allopatric speciation, refers to speciation that takes place when biological populations of the same species become separated as a result of geographic changes like the formation of mountains or social changes like emigration.
In the neo-Darwinian era, the species was universally acknowledged as the basic taxonomic unit of evolution. The creation of new species through evolution while facing a geographic barrier that restricts gene flow and encourages genetic divergence.
Due to movement or changes in the amount of suitable habitat, allopatric speciation processes may produce two related taxa that are physically separated but later become sympatric.
The species barrier will remain intact if there is significant genetic drift in the gene sequences determining mate compatibility during the period of separation.
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