To reach the correct conclusion, follow these procedural steps: 1. Identify Phenotypes & Genotypes
The most common iteration of this lab presents a family dispute. Typical storylines include:
Solving the Lab Activity: Blood Type Pedigree Mystery - Updated Answer Key and Analysis lab activity blood type pedigree mystery answer key upd
For students: Use this guide to check your reasoning, not just your answers. For teachers: The "UPD" version of this lab now includes digital options, Rh factor extensions, and forensic connections that turn a simple worksheet into a memorable investigation.
), the lab might be flawed OR Joseph must carry the recessive To reach the correct conclusion, follow these procedural
Rather than a single linear path to the answer, the updated key presents branching logic. For example: “Claimant 1 has type O blood. Could they be the child of a type AB parent and a type A parent? No, because AB × A can never produce type O (which requires two i alleles).” This approach trains students in hypothesis testing.
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 For teachers: The "UPD" version of this lab
Baby 2 (Type AB) belongs to Family Jones. (If the mother is heterozygous IAicap I to the cap A-th power i or homozygous IAIAcap I to the cap A-th power cap I to the cap A-th power , a Type AB child is highly probable when crossed with an IAIBcap I to the cap A-th power cap I to the cap B-th power 3. Analyzing Family Brown Parental Phenotypes: Mother (Type B) x Father (Type A) Parental Genotypes: Mother ( IBIBcap I to the cap B-th power cap I to the cap B-th power IBicap I to the cap B-th power i ) x Father ( IAIAcap I to the cap A-th power cap I to the cap A-th power IAicap I to the cap A-th power i
"An absolute impossibility," Aris whispered to himself, pacing the narrow aisle between the centrifuges.
Yes. If the grandfather is AO and the grandmother is BO, they can produce an AB child (A from dad, B from mom). This is a 25% probability.