I am so much like my Brother

I look, act, and seem very much like my blood brother and I only got to see him once 10 years ago. It was really freaky because we never grew up together any yet we are so much alike. He has the same mannerisms, body language, speech patterns and everything. It makes you wonder how much nurture has to do with it or if it is mostly nature. The genetic code that binds you together is stronger than anything on the planet.