|MadSci Network: Genetics|
Dear Jennifer It seems to me there are two possible questions here. One is, does the environment have an effect on genes? That is, do environmental factors change the DNA. The answer is definitely yes. I suggest you search for information on radiation AND mutation, carcinogens AND mutation, chemicals AND mutation. That sort of thing. You will some up with plenty of sites. The other question is, do environmental factors affect the expression of an individual's genes. Again, the answer is yes. A classic example is the disease known as phenylketonuria. (Again, a search on that will turn up plenty of information.) In this case, if an individual's diet is changed, the gene has practically no effect on development. And some of the effects of PKU, as it is known, certainly affect personality. Jeremy
Try the links in the MadSci Library for more information on Genetics.