Does Blood Type Determine Paternity?
Saturday, July 31st, 2010 at
9:45 pm
I’m taking a paternity test soon. So far the only information I have is that the child is O positive. I’m not trying to run away from anything, I actually want to take the test and get closure. Whatever the outcome, I just want to know… Does blood type mean anything? I’m O positive as well. The child is O positive. Does this pretty much mean I’m the father?
Tagged with: blood type • blood type determine paternity • closure • does blood type determine paternity • does blood type mean anything • paternity test
Filed under: Paternity Test Information
It doesn’t prove much. The only thing which is weird for an O child is if their father is AB. Every person has their ABO blood type determined by 2 alleles (gene versions), one from each parent. O types have to have two O alleles; AB have 1 A and 1 B (A types may have a hidden O, as long as their other allele is an A, same for B) and so can’t pass on an O to their children. Assuming this is your child, he’s received 1 O allele from you, and 1 from mum.
The rhesus grouping is also due to 2 alleles, but is simpler. Basically a positive child needs at least 1 positive parent.
So the blood info is certainly in favour of your being the father, but nothing like proof.