Evolution and speciation

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5 Terms

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Speciation definition

The development of a new species

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Speciation process

  • Two populations become separated

  • Cannot interbreed (reproductively isolated)

  • Natural selection acts differently

  • Characteristics diverge

  • After time look recognizably different

  • If populations merge again may not be able to interbreed

  • They have evolved into separate species

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Reproductive isolation

  • Species must stop interbreeding with each other

  • Speciation requires barriers preventing gene flow between the gene pools of the two populations.

  • This can be achieved by any method of reproductive isolation.

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Geographical reproductive isolation

A physical barrier divides a population of a species preventing interbreeding

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