Lab Activity Blood Type Pedigree Mystery <Working — 2026>

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.”

Carlos was type A (AO)—so he could have been Julian’s father biologically, but the timing was wrong. The real shock came when Marco secretly submitted a DNA test: he and Julian shared a Y-chromosome marker that Carlos didn’t have. Julian’s father was not a stranger—he was Carlos’s own brother, long presumed dead, who had a brief relationship with Ana before she married. lab activity blood type pedigree mystery

Silence. Then Priya, the group’s quietest member, spoke up. “That changes everything. Two type A parents can have a type O child. But an A and an AB cannot produce a type O child. Ever.” Maya tapped the tray