In: Biology
As we know that allopatric speciation also referred to as a geographical specification. Indisposition when two biological populations of the same species become isolated from each other to an extent that prevents gene flow. A few members of a population cross an existing physical barrier forming a new isolated population an example of this took place among the population of when a smaller number of of fruit flies migrated from an older Islands Kauai Okay two younger Island Oahu.
As they interbreeding themselves and they suddenly produce a whole lot of different genetic material and that means they are physically isolated and as a result of that they are isolated when they reproduce themselves they produce a new trait now now these places will no longer be able to to interbreed with the parents population. This happened because they achieved this because of genetically variability between themselves.