Your Environment May Change Your Genes

An anonymous reader writes "Recent experiments indicate that your environment alters your genes. The longer identical twins live apart, the more their "epigenomes" (genetic sequences that activate or suppress other genes) differ. This possibility could cause a radical shift in the assumptions of biological inheritance (namely that, with minor exceptions, an individual's genes do not change), and indicates the possibility of return of Larmarckian inheritance which had formerly been consigned to the dustbin of biology."

Comments

Re:Misleading headline

[Otter]

A few points:

1) The issue here is methylation and demethylation of DNA sequences, not the submitter's "genetic sequences that activate or suppress other genes".

2) Methylation patterns are heritable through mitosis, so he's not necessarily wrong to say that genes are being "changed".

3) I forget the details of methylation in embryos, but most of it is wiped out between generations. In any case, sperm and egg cells are segregated very early on, so the environment should have minimal effect on changes that get passed along to offspring. The article doesn't address the issue at all.

I applaud the submitter's enthusiasm, as well as his not putting in the usual stupid, inflammatory question at the end. ("Could epigenetics mean the end of Microsoft?") But he could have cut back on the speculation a bit...