Bruce Lipton, an eminent researcher in cell biology, shows the nonsense of this assumption and introduces the concepts of epigenetics where the environment can alter the gene expression by the play of masking proteins.
It also shows that the brain of a cell is not its core, but its cell membrane receptors that act among many other like tuning forks with respect to energy atmosphere of the environment, or even thoughts. So the DNA is not the supreme controller, but a performer. The cell membrane is programmable aillor in the manner of a silicone computer chip.
Then follows the introduction of quantum physics in biology (such as fire walking) but especially the importance capitals unconscious beliefs of the individual. These beliefs are downloaded by the young child, by imitation of its parents and its environment before the age of 6, and this even begins in utero.
So 95% of the beliefs of people come from the experience of others and not their own experience.
The Placebo (eg experience with false Moseley knee surgery) and Nocebo (ill condemned by the physician) are also detailed.
Hence very good advice by the author to bring up children from conception to never instill fear, stress ...
In short, a great book and original and more;>)