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A-Level Biology OCR A

Population Longer Outline Stages Process Speciation Members Isolated

The stages of speciation involve populations becoming isolated, undergoing random mutations, accumulating these mutations and allele frequency changes over generations, eventually leading to the inability to interbreed and form fertile offspring.

Les étapes de la spéciation impliquent l'isolement des populations, des mutations aléatoires, l'accumulation de ces mutations et des changements de fréquence allélique au fil des générations jusqu'à ce que les populations ne puissent plus se reproduire pour former une descendance fertile.

Front Outline the stages in the process of speciation.
Back Speciation:
  • Members of a population become isolated and no longer interbreed with the rest of the population
  • Alleles within groups continue to undergo random mutations
  • Accumulation of mutations and changes in allele frequencies over many generations eventually lead to large changes in phenotype
  • Different populations can no longer breed to form fertile offspring, two species have formed

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