AP BIOLOGY

Detailed explanation-1: -Allopatric speciation is a type of speciation in which biological populations are physically isolated by an extrinsic barrier and evolve intrinsic (genetic) reproductive isolation, such that if the barrier breaks down, individuals of the population can no longer interbreed.

Detailed explanation-2: -Events which can affect the genetic diversity of a population include inbreeding, outbreeding, and genetic drift. Speciation occurs when some kind of barrier prevents successful interbreeding between the members of a species.

Detailed explanation-3: -Broadly speaking, different species are unable to interbreed and produce healthy, fertile offspring due to barriers called mechanisms of reproductive isolation. These barriers can be split into two categories based on when they act: prezygotic and postzygotic.

Detailed explanation-4: -Barriers. Now that you know what speciation means and what types of speciation occur, you may be wondering what prevents separate species from producing offspring? There are two main barriers: prezygotic barriers and postzygotic barriers.