When a rare blood type surfaces in a family pedigree, four lab partners must use serology and deductive reasoning to determine whether a long-lost relative’s inheritance claim is truth—or a clever lie. Story Draft
“But here’s the twist,” Dr. Reeves said. “Carlos is not the father.” lab activity blood type pedigree mystery
The late afternoon light slanted through the lab windows as Maya pinned the last pedigree chart to the corkboard. “Okay, team,” she announced, uncapping a set of blood typing trays. “This is the Martinez family case.” When a rare blood type surfaces in a
“Found in the estate papers,” she said. “Turns out Ana wasn’t AB at all. She was O negative her whole life. The AB was a transcription error made decades ago.” “Carlos is not the father
Leo frowned. “But what if the old record is wrong? Blood typing isn’t perfect. Or what if Ana’s type changed? No—that doesn’t happen. Or what if—” He stopped. “Wait. What if Julian knows that? What if he’s counting on us not checking Ana’s historical type?”