Romansh: Not closely David > > >>> Wiki: Epigenetic changes have been observed to occur in response to environmental exposure—for example, mice given some dietary supplements have epigenetic changes affecting expression of the agouti gene, which affects their fur color, weight, and propensity to develop cancer.-There is a lot more to it than your one reference. It is worth paying some attention to this area of research which is demostrating a great deal of self-direction in evolution. Lamark was not entirely wrong.