Tuesday, March 12, 2013

Comparison between Darwinism and Neo-Darwinism

Darwinism and Neo-Darwinism: Major differences

Darwinism
Neo-Darwinism
1.      Proposed by Darwin and Alfred Wallace
It is the modified Darwinism in the light of genetics
2.      Causes of variations are not included in the theory
It includes causes of variations like recombination of genes, hybridisation etc.
3.      Only small, useful and continuous variations help in evolution.
Genetic variations especially mutations help in evolution.
4.      Unit of evolution is individual
Unit of evolution is population
5.      Survival of fittest is the mode of operation of natural selection.
Differential reproduction and comparative reproductive success are the modes of operation of natural selection.
6.      Reproductive isolation is not included as a postulate in Darwinism.
Reproductive isolation is an essential factor in speciation.

2 comments:

  1. thank you sir .. thanks for this great work

    ReplyDelete
  2. Really! you have give me enough information for my confusion! Thank you sir!

    ReplyDelete

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