Speciation

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Four links, always in this order A barrier splits the population → gene flow stops → each side changes differently → they can no longer interbreed. The last link is the proof.

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A species is a group that can interbreed. A barrier stops gene flow, the groups change separately, and when they can no longer interbreed they are separate species.

Part 1What counts as a species

Part 2Geographic isolation

Part 3From isolation to a new species

Part 4Other kinds of isolation

Part 5Case studies

Part 6Applying the models

Speciation

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