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Histones are spools of proteins that surround the chromosome and control the switching on of genes. National Human Genome Research Institute. Changes made to the protein spools that surround chromosomes are passed down generations, proving that inherited traits are decided by more than just DNA, says a new study.
The Colorado study isn't saying that genes explain everything and that environment doesn't matter. On the contrary, all of the results strongly suggest that our environment plays as big--if not bigger--a role as heredity in shaping personality and intelligence. What it is saying is that whatever that environmental influence is, it doesn't have a lot to do with parents.