e p i g e n e t i c s
Epigenetics : 'Above' the Genes.
Genetic determism held that what we are is determined by our genes, which are fixed and stable, and control how we develop and evolve. Hence, to some extent, a fatalistic view that 'things are hard wired' by nature and hereditary factors, and that controls who you are.
Epigenetics however, builds on an understanding that genes are activated or expressed, and that this expression is responsive to external factors, ie what happens to you can affect which genes become expressed, and hence who you are, what you can do. The Genes we are born with are fixed, the process by which Genes are expressed though, can be altered by environment, and by how we choose to live or lives. This process is controlled by 'DNA Methylation' , the bonding of Carbon and Hydrogen clusters (Methyl groups) onto the exterior of a Gene affecting its speed of commmunication with the rest of the body.