Speciation

 

What do we mean by "species"?

 

Allopatric speciation

            Part of a population becomes isolated

            See genetic divergence over time

            Separation is maintained even without the barrier

 

Reproductive isolating mechanisms prevent interbreeding

            Pre-mating:

                        Behavioral isolation

                        Temporal isolation

                        Ecological isolation

                        Mechanical incompatibility

 

            Post-mating:

                        Gametic incompatibility

                        Hybrid inviability

                        Hybrid infertility

 

Evidence of speciation