Anecdotally, anyone who has ever recontacted an adopted-out sibling will be able to tell you how much this is true. We got back into contact with my older sist

Anecdotally, anyone who has ever recontacted an adopted-out sibling will be able to tell you how much this is true. We got back into contact with my older sister who had been adopted when I was about 12. She's absolutely the spitting image of her parents, both in looks and behavior, despite being raised in about as different a household as is possible.