title: Is it right to exclude (freeze) some genes from genetic operations?
body: <p>I have successfully applied NSGA-II on a multi-objective optimization problem.
  While I was observing the results during the optimization process, I have noticed that some variables (genes) have reached very good values that matches my objectives, while others haven't. However during the optimization, the good genes are being frequently changed and swapped to undesired results (due to genetic operations; mutation and crossover) until the algorithm reaches a good local optima, or hits a condition.</p>
  <p><strong>My question is this:</strong></p>
  <p>Can I exclude some genes from the optimization process since they have already reached my condition and finally combine them with the remained genes in the final chromosome?</p>