Speciation: Of Ligers & Men - Crash Course Biology

The video explores the concept of species, focusing on humans and dogs. It explains species as groups that can interbreed and produce fertile offspring, using examples like ligers and mules to illustrate hybridization. The video discusses reproductive isolation, both prezygotic and postzygotic, and how it leads to speciation. Allopatric and sympatric speciation are explained, with examples from Darwin's finches and the Grants' research. The video concludes with artificial selection in dog breeding, highlighting how different breeds can still interbreed due to being the same species.

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