you would need to be blood typed by a laboratory test. you can't rely on genetics when it comes to blood type. i don't know your age but if you are old enough to donate blood you will find out your blood type for free!
how do you learn your blood type? . even though i've had my blood drawn quite a few times i don't know how you can learn what type you have. my dad says i needed blood transpered from my grandpa on his side when i was born and he's ab+ so does that make me that type or something else?