Montreal — You are what you eat.And who you hang out with, and the weather and the way your mother raised you, say gene researchers at McGill University.Contrary to popular belief, recent research at McGill helps to prove your DNA alone does not determine who you are, says Michael Meaney, a neuro-biologist at the university.While external factors like environment and experience don’t alter our basic human genetic code, they do produce permanent changes to the way genes behave, says the McGill team.Montreal — You are what you eat.And who you hang out with, and the weather and the way your mother raised you, say gene researchers at McGill University.Contrary to popular belief, recent research at McGill helps to prove your DNA alone does not determine who you are, says Michael Meaney, a neuro-biologist at the university.While external factors like environment and experience don’t alter our basic human genetic code, they do produce permanent changes to the way genes behave, says the McGill team.