Class 12 Biology Evolution Mechanism of evolution

Mechanism of evolution

  • Evolution needs variations.
  • Origin of variation and reason for speciation is inheritable factors influencing phenotype.
  • Mendel explained the influence of inheritable actors on phenotype.
  • Darwin mentioned that natural selection is the reason for evolution
  • Hugo de Vries based on his work on evening primrose believe that mutation causes evolution.
  • Evolution for Darwin was gradual while de Vries believed that mutation caused speciation and hence called it

fig. evening primrose  

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