I grew up thinking I was O+ like my mom pops and siblings until last year i donated some blood at the Red Cross for like first time since I've been an adult, im 28. They gave me that card with my blood type and it said A+
.
How could this be? I ask dude who gave me the card and he just gave me the
.
I ask both my parents about it one day and they were like
.
Someone please give me a refresher on biology........
Please
.How could this be? I ask dude who gave me the card and he just gave me the
.I ask both my parents about it one day and they were like
.Someone please give me a refresher on biology........
Please








both my parents are O but one is negative and the other is positive