Biology / Unit 8 Bio 1733 worked example, 60 to 90 seconds
Tracing One Allopatric Speciation Event
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The idea
This procedure traces one allopatric speciation event from an isolating geographic event through independent divergence to confirmed reproductive isolation.
Where people slip
Confirming speciation requires testing whether interbreeding still succeeds after reintroduction — divergent traits alone, without a demonstrated reproductive barrier, do not confirm two populations have become separate species.
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