Maya tapped the tray. “So we need to test Julian’s actual blood against Ana’s archived sample and the father’s hypotheticals. But the family won’t release the father’s info.”
After running the simulations, Maya’s group confirmed that a type O child can only come from a type O parent or a heterozygous A/O or B/O parent. Since Ana was OO, Julian’s father must have contributed an O allele. That means Julian’s biological father was either type O, A, or B—but not AB. lab activity blood type pedigree mystery
“But that’s not the only clue,” Dr. Reeves added. “Carlos’s blood type was confirmed type A—but Ana’s medical record from decades ago shows she was typed as type AB.” Maya tapped the tray
Dr. Reeves handed them a sealed evidence bag. Inside: a worn hospital wristband labeled Since Ana was OO, Julian’s father must have
“But here’s the twist,” Dr. Reeves said. “Carlos is not the father.”
“Standard family,” Leo shrugged. “What’s the mystery?”