According to genetic inheritance rules, the chance of an AB blood type child when both parents have B blood type is generally lower but possible. Most common possibility is if either parent is a chimera.
[b]Chimerism[/b] is a condition where a person or animal has two different blood cell types at the same time. Innate chimerism occurs in nonidentical twins through blood vessel anastomoses. Synthetic chimerism can be acquired through blood cell transfusions or transplantations. Blood group chimerism in humans is not rare, especially in multiple births. In humans, twin blood group chimerism is usually found by coincidence during routine blood grouping. In these cases, the blood group mixtures are usually 50/50%, 25/75%, or 5/95%. One example of chimerism is a male chimera with blood that was 61 percent type B and 39 percent type A.
While blood type was often used during the early 1900s as a rudimentary paternity test, today more reliable tests like paternity tests or ancestry-type tests are available. There is also possibility of error in blood type test result in anyone of person.
IF someone gets a bone marrow transplant it can change a blood type. Unlikely, I'm guessing.
Babies also get switched in hospitals.
It CAN be painful, but I would see it as confirmation that our parents are human. If treated as their child with love, etc., what is the intrinsic difference in the end?
My one grandmother cheated. My other grandmother and mom floated that possibility, and it was confirmed with an ancestry DNA test, bc I have no business having African in me otherwise
No, not a joke @Wateribbon. Not making fun or insulting. That problem generally implies adoption, marital infidelity or even switched at birth. A DNA test might shed some light on it.
One couple, the husband started accusing the wife of infidelity, until she took a test and was not genetically the mom. Their child had been switched at birth. Other times, wives may have had infidelity and sought to keep it a secret. How is that making fun or insulting?
Well, if you did get a DNA/paternity test, AND you are a match for both parents, then someone is probably mis-typed.... one parent needs to be either A or AB. Two parents with B blood type can produce a child with either B or O blood type.
Group A and group B are present in both your parents so any grouping of those letters only is proof positive that you're their progeny. Group O is recessive which means if you have group O only Somebody with it could give it to you
