These are genes that, for whatever reason desired, restrict bot's behavior.
'Last Gene reduces mutations that add to genome. cond *.dnalen 78 > *.genes 10 > start .delgene inc stop
Will destroy any bot that changes the number of genes or dna length.
Evolution will eventually break any overly restricive genes. Any number of mutations, changes to the referenced values, or changes to effected value(delgene) can change this genes behavior.
If you desire to use any genes similar to this simply do so in the knowledge that they will only last for only the first several generations.