Genes are linear sequences of nucleotides along a segment of DNA with varying characteristics. I only partially agree with the theory that DNA provides the coded instructions for synthesis of RNA, which, when translated into protein, leads to the expression of hereditary character. I believe that nucleotides express themselves through electro-magnetic and metaphysical energies that determines appearance and behavior. It is an active energy-process rather than merely plan-execution or fate.
Take for example, a formidable athletic team. In a winning team, you will find a group of highly energized and skillful athletes working well together to accomplish the manipulation of the object of the game played. The players are not simply instructed or coded to function well, they have natural ability and skill. Natural ability and skill are integral parts of their beings and their bodies. Therefore, it is not simply code but energy, innate intelligence and ability coupled with large degrees of muscular health.
Appearance and behavior will be similar to the people from whom they are offspring. However, the role of genes appears to be much more choice than fate, except when industrial chemicals and the free- radicals that result from industrial chemicals disrupt bacteria and other nutrients, and nucleotides, resultantly disrupting and destroying and/or altering important RNA and DNA structures. The greatest damage to genes in our "advanced" societies are all vaccines that contain very toxic and harmful adjuvants.