Topic 5B: Evolution, Natural Selection And Speciation Flashcards

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1
Q

Explain how a new species may have evolved due to allopatric speciation(5)

A
  • Geographical isoloation due to physical barriers stops interbreeding and gene flow
  • random genetic mutations cause variation in the population which allows some to do so and so (1)
  • these individuals {will be selected for / are more likely to survive and reproduce} (1)
  • the proportion of individuals in the population with this mutation will change over time (1)
  • over many generations these populations become genetically distinct from the above ground population (1) (reproductively isolated)
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