Blood Type Pedigree Mystery Analysis | PDF | Genotype - Scribd
The evidence clearly points to a thief with blood and attached earlobes .
(heterozygous). This distinction is the key to solving the mystery. 4. Common Misconceptions (Updated for 2026 Curriculum) →right arrow FALSE. Type O ( ) only passes on the allele. An AB child needs to receive IAcap I to the cap A-th power IBcap I to the cap B-th power "Type AB parents can have an O child." →right arrow FALSE. Type AB ( IAIBcap I to the cap A-th power cap I to the cap B-th power ) will pass on either IAcap I to the cap A-th power IBcap I to the cap B-th power , ensuring the child is A, B, or AB.
Two families (The Smiths and The Joneses) have babies (Baby X and Baby Y) born on the same night. The tags are lost. The Smiths: Parents are Type O and Type AB. The Joneses: Parents are Type A and Type B. The Babies: One is Type O, one is Type AB. Who belongs to whom? 2. Updated Answer Key and Explanations lab activity blood type pedigree mystery answer key upd
Part 4: Frequently Asked Student Discussion Questions (With Answers)
| Genotype | Phenotype (Blood Type) | | --- | --- | | AA or AO | A | | BB or BO | B | | AB | AB | | OO | O |
Baby 3 (Type B) belongs to Family Brown. If the mother passes her IBcap I to the cap B-th power allele and the father passes his recessive allele, the child will be IBicap I to the cap B-th power i Summary Master Matrix Mother's Genotype Father's Genotype Assigned Baby Baby's Genotype Smith Baby 1 (Type O) Jones IAicap I to the cap A-th power i IAIAcap I to the cap A-th power cap I to the cap A-th power IAIBcap I to the cap A-th power cap I to the cap B-th power Baby 2 (Type AB) IAIBcap I to the cap A-th power cap I to the cap B-th power Brown IBicap I to the cap B-th power i IAicap I to the cap A-th power i Baby 3 (Type B) IBicap I to the cap B-th power i Blood Type Pedigree Mystery Analysis | PDF |
Because individuals inherit one allele from each parent, these three alleles combine to form four distinct phenotypes (blood types) and six possible genotypes: Phenotype (Blood Type) Antigens on Red Blood Cells IAIAcap I to the cap A-th power cap I to the cap A-th power (Homozygous) IAicap I to the cap A-th power i (Heterozygous) Type B IBIBcap I to the cap B-th power cap I to the cap B-th power (Homozygous) IBicap I to the cap B-th power i (Heterozygous) Type AB IAIBcap I to the cap A-th power cap I to the cap B-th power (Codominant) Both A and B antigens Type O (Homozygous Recessive) Neither antigen The Rh Factor
. Fiona is a legitimate biological child of David and Grace. Case 2: Charles (The Claimant)
allele. If they have a Type B child and Rita is AB, Joseph must provide either an cap I to the cap B-th power Joseph's Typical Result: , Genotype cap I to the cap B-th power i Course Hero 4. Match Suspects to the Crime Scene An AB child needs to receive IAcap I
are codominant to each other and both are dominant over the recessive
Modern, updated versions of this lab may include additional genetic markers (like Rhesus factor +/−positive / minus ) to make the mystery more complex. Conclusion
Based on blood type analysis, the thief is typically identified as (in most standard versions of this lab).
Eleanor didn't actually have blood type O alleles. Genetically, Eleanor was blood type B.
Since Joseph’s specific genotype is often a "mystery" in the lab, use his children’s blood types to deduce it. If Rita is Type AB ( cap I to the cap A-th power cap I to the cap B-th power ) and they have a child who is Type O (