They have been pre-programmed to build cells, develop cells and make them work together. Like a computer, the hardware is set in stone, but the software can change how they work, just like our environment.[1] Genes indirectly influence our behaviour as the nervous system and our brain is the intermediary in the transaction decision because it reasons and processes all of the gene instructions into one decision, movement or behaviour.[13][14] The way neurons connect is dependent on the environment, learning and experience.