1.0 link Rainbow Dash Network http://rainbowdash.net/ Cloud Kicker (critialcloudkicker) http://rainbowdash.net/critialcloudkicker http://rainbowdash.net/notice/2527388 @<span class="vcard"><a href="http://rainbowdash.net/user/1" class="url"><span class="fn nickname">cabal</span></a></span> Lets see if I remember well enough how this works to explain it. When you are born you get 2 copies for every gene 1 from mommy and 1 from daddy, both of which have an ABO code for blood. ( also the Rh factor, which is always either positive or negative ) Then if you would make a punnet square knowing only my dad's side ... Oh wait, yea there is a chance I might actually have AB blood, but only if my dad has a dominant O and code for A ( or B ) in his genetic code, and my mom had B ( or A ) with no genetic code for O. Those chances are however, very slim compared to being pure A pure B or pure O ( which are in turn slim when compared to having a dominant A B or O with code for A or B or O ) ... You know I would need my mom's blood type for this.