I think it's usually a function of what data structure your "genotype" is stored in. In my experiments with GAs, defining a coefficient for mutation that is ei

I think it's usually a function of what data structure your "genotype" is stored in. In my experiments with GAs, defining a coefficient for mutation that is either far too high or far too low means you search search for too much of the problem search space or far too little, respectively. Testing parameters such as the frequency of mutation are part of the iterative process of tuning your GA.