The neutral theory of evolution proposed that most genetic m
     The neutral theory of evolution proposed that most genetic mutations are functionally neutral. Neutral mutations are fixed in a population by  natural selection  random genetic drift  environmental selection  asexual reproduction  the invariance of DNA 
  
  Solution
The neutra theory of evouloution proposed that most genetic mutations are functionally neutral.Neutral mutations are fixed in a population by-
ans- E. the invariance of DNA
(In a population genetics,fixation is the change in a gene pool with atleast two variant of particular gene or allele)

