I wasn’t sure what to flair this over. I’ve been having doubts whether my dad is my younger brothers dad. I’m 27, he’s 24. I’m the spitting image of my dad. My brother: -2-3 inches taller than my dad or I. -no balding at all and it is all on my dads side, early. -different facial structure, eyes. -extremely conscientious, other side of the spectrum than me.

So.... what are my options at approaching this? The way I see it, I can: -ask my mom -somehow ask my brother to do an ancestry.com test, but I don’t know how to convince him? Could be a gift, but he would wonder why he needs to do it when I can do my own.. -figure out his blood type somehow and compare it to me and my parents? And even if I got his type, I’d need to get my parents type -that’s all I got.

Really looking for some useful advise here. I want to know whether this is my half brother or not.