Paul Andersen explains how reproductive isolation can eventually lead to speciation. Three main barriers to gene flow are included: geographic, pre-zygotic and post-zygotic. Both allopatric and sympatric speciation are discussed. A brief discussing of polyploidy and punctuated equilibrium are also included.

Bozemanscience Resources

Speciation Concept Map 
Speciation Slideshow 

Education Resources

Speciation Review Worksheet - Winnie Litten