Genes are blueprints of instructions that cells follow to produce proteins and carry out other cellular processes. The co ordination of these genes results in the complex functions and structures of the brain(Neurogenetics). Also, the gene is a cytological library of instructions for inheritance (traits). Even when we talk about conditioned behavior. Epigenetic factors sets in whereby changes in gene expression or function that occur without altering the underlying DNA sequence. Epigenetic modifications can affect how genes are turned on or off, which in turn can impact neural circuits and behavior. I still wonder how AUG codes for methionine to start protein synthesis and UGA, UAG, and UGA signal the end of protein synthesis. I would say intelligence at the biochemical level maybe am wrong smiles! Even to the smallest of atoms.