Hey there - First off I would like to say congrats to all the idiots out here that CANT do the math -- they were close. SO your DAD is O your MOM is A? (lets say) AND YOU ARE B! Now, I can tell you this -- there is a HIGH CHANCE THAT indeed you ARE their kid! Don't listen to all these idiots. It is your Dad who is really B - If your DAD is O, supposedly - he is the one that gave you the B . Here is how i will break it down for you -- B=O? OK, so people who are marked as O blood type ARE not always O blood types - there is something called ANTIGEN HH This antigen when surfacing on your blood platelet - tells people when they are testing you you are O but your not!!! So- if you are sure your dad is your dad - understand this that - you have inherited his B as he is BO and mom AO or vice versa - as only that combo would give AB:AO:BO:OO , AO and BO are phenotype fro A and B consecutively - SO there -- your mystery is solved!! Yes it is highly possible that they are your parents - If you don't think they lie to you , or you got your mom or dad's toes etc.. then this is the case... AND as a check - you can ask you dad or mom whoever is O to get an ANTIGEN HH test - it is a specific test that will seek it out -- and then you will TRULY know. Remember this BOMBAY PHENOTYPE means it looks like O cause it presents the antigens but it can be A, B , or AB underneath!!

omg...if u ask me u still have a mystery...deciphering all tht genetics talk

...somebody didn't pay attention in biology class...

It's not an FML if you are a mutant. You can be like Wolverine!

Dear 314 (and others), You are incorreect. If he is correct about his parents blood types (and you'd be surprised how many people don't know what their blood type is, or remember it incorrectly), then he is not their child. Assume that his mom's genotype (what her actually genetic blood type is) is AO. Then her phenotype (what her blood type looks like) is A. Assume the father is OO (what he MUST be if his phenotype is O). There is now way they would produce a child that is B. ( If the father were genetically BO, he would type as B). The Bombay blood type is extremely rare. If, as you suggest the father is a para-bombay with B, then he would still type as B.

And yes, I see the typo. :)

I just realised my mum's blood type's O and my dad's A. Thanks to you now I know .... My blood type's B as well.

whoever had O cheated(maybe)

*examines you* ....hmmm.... Ok, it's official, you're a mutant

F your life, and that sounds like my last science assessment. Right down to the blood types. Is your name Matthew, by any chance?