Lab Activity Blood Type Pedigree Mystery Answer Key Upd Jun 2026

A family pedigree shows blood types for several individuals across two generations. You must determine possible genotypes and trace inheritance of ABO blood groups and Rh factor to identify the likely parentage and explain contradictions.

Disclaimer: This guide provides solutions for standard, widely used educational versions of this lab. Specific scenarios may vary by institution.

A sophisticated answer key will note rare phenomena, such as the Bombay phenotype (where a person inherits ABO alleles but lacks the H antigen, appearing as type O even if genotypically A or B). While not central to the mystery, this note teaches that real-world genetics has outliers. lab activity blood type pedigree mystery answer key upd

Start with the known, homozygous phenotypes (Type O is , Type AB is IAIBcap I to the cap A-th power cap I to the cap B-th power ) and work toward the unknown, heterozygous parents.

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The most common version of this activity is the "Mystery in Wexford." Here's the scenario:

), and pedigree analysis to help students understand how traits are inherited and how medical detectives solve familial mysteries. A family pedigree shows blood types for several

Arthur and Eleanor can produce a child with any blood type.

The "Blood Type Pedigree Mystery" lab activity masterfully combines deductive reasoning with core genetic principles. It teaches students to move beyond memorizing Punnett squares and apply them as a dynamic tool to solve real-world (or in this case, fictional) problems. Understanding the inheritance patterns of ABO blood types, the Rh factor, and simple dominant/recessive traits like earlobe attachment are all essential skills for anyone studying biology. Specific scenarios may vary by institution

The following table summarizes the key family members and their traits used to narrow down the thief: Blood Type Earlobe Trait Genotype (Blood/Lobe) Father/Grandfather cap I to the cap B-th power i Mother/Grandmother cap I to the cap A-th power cap I to the cap B-th power cap I to the cap A-th power i Granddaughter cap I to the cap A-th power i 4. Solve the mystery The crime scene evidence consists of Type A- blood attached earlobes Course Hero Suspect Identification

To crack the case, you first need to understand the genetic rules of blood types. The ABO blood group system is determined by three alleles: IA , IB , and i . The i allele is recessive, while IA and IB are both dominant over i and are with each other. Here's a quick reference table: