ANSWERS: 1
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Yes, this is possible. The four bloodtypes (A, B, AB, and O) can be represented as follows: A = AA, AO B = BB, BO AB = AB O = OO If both your parents are AO, then there is a 1/4 chance for you to have type O blood. If either parent was AA, then it is impossible for you to have type O blood. The Rh factor (the positive or negative) can be represented as follows: Positive = Rh+Rh+, Rh+Rh- Negative = Rh-Rh- So, if your parents are both Rh+Rh-, there is a 1/4 chance for you to have Rh-Rh- blood. When you put both the bloodtype and the Rh factor together, it is entirely possible for you to have O negative blood. Please see these other answers for more information: http://www.answerbag.com/q_view.php/16667 http://www.answerbag.com/q_view.php/37780
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