Gene expression is partially inherited and partially a product of environment. See https://en.wikipedia.org/wiki/Transgenerational_epigenetic_inheritance https:

Gene expression is partially inherited and partially a product of environment. See https://en.wikipedia.org/wiki/Transgenerational_epigenetic_inheritance https://en.wikipedia.org/wiki/Transgenerational_epigenetic_i... The classic example discussed is a study of children born during a famine. Children born during famine are going to be smaller than normal, but it was found that their children and grandchildren would be born smaller than normal, even though the famine has long since passed. This change has been attributed to a particular methylation pattern that was passed down. It's known that things like exposure to famine and abuse can change methylation patterns, but this study suggests that non-traumatic things like your cultural upbringing can affect methylation.