This chapter discussed speciation by genetic divergence following geographic isolation, which is expected to lead to reduced gene flow. This is known as allopatric speciation. A more controversial form of speciation is genetic divergence of populations without physical isolation; this is called sympatric speciation. Can you envision a mechanism or process that would permit two coexisting populations of the same species to begin to diverge without being isolated from one another?

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The Answer of This chapter discussed speciation by genetic divergence following geographic isolation, which is expected to lead to reduced gene flow. This is known as allopatric speciation. A more controversial form of speciation is genetic divergence of populations without physical isolation; this is called sympatric speciation. Can you envision a mechanism or process that would permit two coexisting populations of the same species to begin to diverge without being isolated from one another?

This Chapter Discussed Speciation by Genetic Divergence Following Geographic Isolation