Why my parents’ blood group is B positive and mine is AB positive. How is this possible?
Please explain..
26-30
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ABCDEF7 · M
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.
[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.
