Lab Activity Blood Type Pedigree Mystery Answer Key Upd Jun 2026

: To match the remaining child, both parents must be heterozygous:

| Evidence Component | Finding | Implication | | :--- | :--- | :--- | | | Type A- | Suspect must have genetic ability to have Type A blood | | Witness testimony | Attached earlobes | Suspect must have ee genotype | | Suspect III-4 | Type A & attached | Matches both pieces of evidence ✅ | | Other suspects | Other blood types or free earlobes | Do not match all evidence ❌ | | Motive | Not a blood relative | Ineligible for inheritance → jealousy |

Your task is to use a pedigree chart and genetic principles to analyze the family's blood types and earlobe attachments to determine which family member matches both pieces of evidence and is, therefore, the most likely thief.

Look for the "hidden" recessive allele. If a pedigree shows an O child (

If you encounter a pedigree where a child's blood type appears impossible given the parents, you can consider the following: lab activity blood type pedigree mystery answer key upd

Students must analyze the three-generation family pedigree to determine if Leo is biologically related, identify genotypes for all family members, and solve the "mystery" of the missing alleles. 3. Master Answer Key & Pedigree Solutions Generation I (Grandparents) Genotype must be IAicap I to the cap A-th power i . Proof: He had a child (Charles) with Type O blood ( ). Charles had to inherit a recessive allele from both parents.

: Utilizing codominance and complete dominance.

The evidence clearly points to a thief with blood and attached earlobes .

To help visualize the solution, here is a simplified summary of the final findings and the evidence against the suspect: : To match the remaining child, both parents

) and tracking them through a pedigree, you can solve any familial, medical, or legal scenario presented in the lab.

If your lab uses chemical simulations (such as using simulated blood with synthetic anti-A and anti-B sera), ensure students record their agglutination data accurately before they start drawing the pedigree.

: Ensure students correctly use circles for females, squares for males, and properly shade or half-shade symbols if tracking a specific recessive trait like Type O or Rh-.

The mystery is solved by exclusion. The genetics prove that the Claimant cannot be the offspring of the Father and Mother in this specific pedigree. Charles had to inherit a recessive allele from both parents

The ABO blood type is determined by a single gene with three alleles: IAcap I to the cap A-th power IBcap I to the cap B-th power : Alleles IAcap I to the cap A-th power IBcap I to the cap B-th power

Whether you are a student looking to review the logic behind the answers or a teacher preparing to facilitate this lab, this article breaks down the mechanics of the mystery, the necessary genetic principles, and the final solution.

, depending on the specific lab version), identified by having Type A blood attached earlobes , matching the evidence found at the crime scene. or a list of analysis questions to include in your feature?