The "Blood Type Pedigree Mystery" is a popular forensic-style lab activity used in biology classrooms to teach Mendelian genetics and pedigree analysis . In this scenario, students act as genetic detectives to solve a crime—often a theft—by tracing the inheritance of blood types and other physical traits like attached earlobes through a family tree. Core Concepts of the Mystery
| | Expected Answer | |----------------|----------------------| | Determine possible genotypes from blood types | Use IA, IB, i with dominance/codominance | | Identify impossible parent-child combinations | Type O parent cannot have Type AB child; Type AB parent cannot have Type O child | | Solve paternity/maternity mystery | Compare child’s required allele from each parent | | Explain inheritance pattern | Codominant (IA, IB) and recessive (i) | lab activity blood type pedigree mystery answer key
Blood type is a classic example of a trait determined by genetics. In humans, blood type is determined by the system, which is an example of codominance and multiple alleles . The "Blood Type Pedigree Mystery" is a popular