In order for allopatric speciation to occur,first there must be a geographic separation of two populations of the same species.The second step requires:

Question

Quizplus · Accepted Answer

Physical and behavioral changes are necessary to prevent interbreeding between the two populations, ultimately leading to speciation. This can occur through natural selection, genetic drift or mutation, and can result in anatomical, physiological, or behavioral changes that reduce or eliminate the possibility of interbreeding. Additional extrinsic isolating mechanisms may further reinforce this barrier to gene flow, but they are not a prerequisite for allopatric speciation to occur. An increase in gene flow would result in the opposite of speciation, and physical and behavioral changes that permit occasional hybridization would also hinder speciation by allowing gene flow between the populations.

In Order for Allopatric Speciation to Occur,first There Must Be