We have friends, neighbors, and family who have biological children as well as children adopted as infants. In the case of a typical blended family like this all of the children have been treated the same. Raised under the same roof, have the same folks, provided the same opportunities, etc. What have you seen in scenarios like this? Do you think their personality is formed by their upbringing or was it ingrained at birth? Said another way, do they turn out as they would have anyway or does their upbringing imprint on their personality?