“That’s your lab task,” Dr. Reeves smiled. “Using only the pedigree and a fresh blood sample from Julian, determine if he could be Ana’s son—and whether the estate should accept or reject his claim.”
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?” lab activity blood type pedigree mystery
A parent with Type O blood cannot have a child with Type AB blood. “That’s your lab task,” Dr
A wealthy eccentric has passed away, leaving a massive estate. A young man claims to be the long-lost grandson, but the family is skeptical. Using the blood types of the deceased, the surviving family members, and the claimant, students must determine if the claimant’s genetics are even possible within this family tree. Setting Up the Lab Materials Needed: “But what if the old record is wrong
Profiles of family members including their known phenotypes. The Investigation Process:
This laboratory activity investigates the principles of human genetic inheritance through the analysis of ABO blood types. By simulating a scenario involving a disputed inheritance, students utilize Punnett squares and pedigree analysis to determine the validity of a claimant’s biological relationship to a deceased individual. The experiment tests the predictability of Mendelian inheritance and codominance. Results indicate that the claimant’s blood type is genetically impossible given the phenotypes of the alleged parents, thereby disproving the biological relationship. This activity reinforces the practical application of immunology and genetics in forensic science.