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Unformatted text preview: f. copulatory failure-anatomical, mechanical -Post-mating a. failure to fertilize b. zygote death (zygote=fertilized egg) c. fetal death d. death of offspring e. offspring healthy but sterile (mules) Patterns of Speciation: Allopatric-involves geographic separation-geographic separation between two populations of the same species triggers the emergence of a new species (pg. 95) Parapatric-when two populations occur adjacent to one another, with continuous gene flow back and forth between them, speciation of one from the other is nevertheless possible, especially if one of both species occur over a very large geographic area Sympatric-occurs in same population -species arise in the same place but are genetically different -outwardly look the same Cline: variation in a trait over a wide geographic area...
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This note was uploaded on 01/05/2011 for the course ANTH 200 taught by Professor Stanford during the Fall '08 term at USC.
- Fall '08