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Before diving into the mystery, students must master the underlying genetics of the ABO blood group system. The ABO blood type trait is controlled by a single gene with three common alleles: IAcap I to the cap A-th power IBcap I to the cap B-th power IAcap I to the cap A-th power IBcap I to the cap B-th power
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: The parent must have received an IAcap I to the cap A-th power IBcap I to the cap B-th power lab activity blood type pedigree mystery answer key upd
The updated answer key serves as more than a grading tool. It is a scaffold for metacognition. When students compare their reasoning to the key, they learn to:
| Blood Type (Phenotype) | Possible Genotypes | Antigen on RBC | Antibody in Plasma | | :--- | :--- | :--- | :--- | | | IAIA or IAi | A antigen | Anti-B | | B | IBIB or IBi | B antigen | Anti-A | | AB | IAIB | A and B antigens | None | | O | ii | None (H antigen only) | Anti-A and Anti-B |
trait. Free earlobes are dominant (F), while attached earlobes are recessive (f). Individuals with attached earlobes must have the genotype ABO Blood Types : This involves multiple alleles cap I to the cap A-th power cap I to the cap B-th power codominance cap I to the cap A-th power cap I to the cap B-th power Do you need the in text format for a specific question
Both follow simple Mendelian inheritance . Rh+ ( ) and Free earlobes ( ) are dominant; Rh- ( ) and Attached earlobes ( ) are recessive. 3. Solving the Mystery
The servant claimed O is impossible. The servant is wrong – but wait, the lab says "Keep reading... the royal bloodline historically has never produced O."
number individuals within a specific generation from left to right. 3. The Mystery Scenario: The Disputed Estate This link or copies made by others cannot be deleted
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
Before grading or delivering the lab, review the standard phenotypes and genotypes utilized in the pedigree chart: Phenotype (Blood Type) Genotype(s) Antigens on Red Blood Cells
: Heterozygous Type A and Type B parents can produce children of any ABO blood type (A, B, AB, or O). If both are heterozygous for Rh ( ), they can also produce both Rh+ and Rh- children. Child Match : Child 2 (Type AB-) . Reasoning : Mr. Smith passed down the IAcap I to the cap A-th power alleles, while Mrs. Smith passed down the IBcap I to the cap B-th power Summary of Child Matches: Child 1 (O-) belongs to The Jones Family . Child 2 (AB-) belongs to The Smith Family . Child 3 (B+) belongs to The Davis Family . Part 4: Solving the Estate Claim (The Long-Lost Grandchild)