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.
Phenotype is Type O , meaning his genotype is . The Genotypic Math: Charles requires one allele from Beatrice and one allele from Edward. We know Beatrice is IAicap I to the cap A-th power i (she can provide an Edward is Type B . If Edward's genotype is IBicap I to the cap B-th power i , they can successfully produce a Type O child ( The Punnett Square (Beatrice IAicap I to the cap A-th power i IBicap I to the cap B-th power i ): IBcap I to the cap B-th power IAcap I to the cap A-th power IAIBcap I to the cap A-th power cap I to the cap B-th power IAicap I to the cap A-th power i IBicap I to the cap B-th power i (Type O)
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daughter, was likely adopted (since both he and his partner Robyn are ), and thus she was excluded from the inheritance. 1. Identify the Inheritance Patterns lab activity blood type pedigree mystery answer key upd
Here is the updated pedigree:
The presence of a Type O child is the biggest clue, as it implies both parents must carry the
for those who possess the trait found at the crime scene (attached earlobes). Coventry Local Schools 3. Work Backwards to Find Joseph’s Genotype If your lab uses chemical simulations (such as
Type AB or Type O.
The "Blood Type Pedigree Mystery" lab activity typically involves a wealthy family, the , where a death or theft (such as missing money from a safe) requires students to use genetics to identify the culprit. 🔍 The Mystery Breakdown The lab usually centers around and
| Claimant | Claimed Blood Type | Possible Biological Child? | Explanation | | :--- | :--- | :--- | :--- | | Claimant 1 | Type A | | Genotype AO – Received A from father, O from mother. | | Claimant 2 | Type B | YES | Genotype BO – Received B from father, O from mother. | | Claimant 3 | Type O | NO | Genotype OO would require father to donate an O, but AB father has no O allele. | We know Beatrice is IAicap I to the
While specific lab versions vary, most "updated" mystery activities follow a similar logic. Here are the likely answers for the standard pedigree markers:
The only possible blood types for their biological children are Type A or Type B . Type O and Type AB are impossible.
). The Grandfather is Rh+ and the Grandmother is Rh+. If both grandparents are heterozygous ( ), they could pass down the generations.