Quote:
Originally Posted by christiangirl
My blood type has always been a "sensitive issue" in my family. 
Both my parents are A+ (and so is my sister) so when I was born, they just told the doctors I should be A+ because they both are AND THE IDIOTS PUT THAT IN MY MEDICAL CHARTS WITHOUT CHECKING. So I lived my whole life with that in my records and all the times I had blood drawn, no one thought to check or change it. When I gave blood at 18, I found out I was O+.  It totally freaked me out--I thought I had been adopted or switched at birth or something. I didn't think it was possible to be a different blood type than both your parents but my mom researched it and told me to get a grip, it can happen.  |
Yeah, ABO blood typing has recessive and dominant features, so your parents are actually AO, and when you were conceived and magical genetic things happened you ended up being O, which you only had a 25% chance of being. Your sister ended up in the 75% category of being A.
Once you're O, you can only pass on O to your kids, so when my ex and I were discussing children we knew our kid would be O since we are both O+ (and likely blue eyed and blonde or red headed since all of our features are recessive). Eventually over time there will be more and more people in the world with O blood, as there are less pockets of people who are not intermarrying and interbreeding with others.