Lab Activity Blood Type Pedigree Mystery Answer Key Upd

"An absolute impossibility," Aris whispered to himself, pacing the narrow aisle between the centrifuges.

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: The ABO blood types are controlled by a single gene (the ABO gene) with three types of alleles: A, B, and O. The A and B alleles are codominant, while the O allele is recessive to both A and B. lab activity blood type pedigree mystery answer key upd

How does codominance differ from traditional dominant/recessive traits? Common Student Misconceptions Thinking Type AB parents can have Type O children. Correction: Remind students an AB parent has no Mistake: Assuming Type A always means a genotype of IAIAcap I to the cap A-th power cap I to the cap A-th power

| 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 | This requires both parents to carry at least

. This requires both parents to carry at least one recessive allele and one recessive

The Punnett square shows that John (A) and Mary (O) can have children with genotypes AO or OO. the necessary genetic principles

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.

Last updated: May 2026 – Verified against common high school lab manuals.