The scandal would destroy the family name, but the science was undeniable.
In the modern era, has become the primary tool for resolving these mysteries. Unlike basic blood typing, which only looks at the "flags" on the cell surface, DNA testing looks at the actual "instruction manual" (the genome), revealing the mutations or chimerism that simple blood tests miss. Solving Your Own Pedigree Mystery
To have Type A, B, or AB blood, your body needs a foundation called the "H antigen." Think of it like a flagpole; the A and B antigens are the flags. If you don't have the flagpole, you can't fly the flag.
"Look at the chart!" Marcus shouted, stabbing a finger at the paper. "A and B parents make A, B, AB, or O! I’m a B! It fits!"
A baby has Type O blood . The mother has Type A blood . One potential father has Type AB , the other has Type B . Can you solve the pedigree puzzle before the DNA results come back?
: The paper "An unusual case of blood group ABO inheritance: O from AB X O" details a Japanese family where an O-type child was born to AB and O parents. Unlike Cis-AB, this was caused by a rare structural mutation during the formation of the egg (oogenesis).