Lab Activity Blood Type Pedigree Mystery Answer Key Upd Jun 2026

Could a Type AB father and a Type A mother have a Type O son? Explain. A2: No. Type AB father (IAIB) has no i allele to pass. Type O requires genotype ii. Therefore impossible.

The Lab Activity Blood Type Pedigree Mystery Answer Key: Solving the Genetic Puzzle

). They can produce children of any blood type (A, B, AB, or O).

This article provides a complete guide to the activity, including a detailed answer key, so you can fully understand the logic behind solving the mystery. lab activity blood type pedigree mystery answer key upd

The Blood Type Pedigree Mystery lab activity offers a practical and engaging way to teach students about ABO blood type genetics, Punnett squares, and pedigree analysis. By working through this activity, students develop essential skills in critical thinking, problem-solving, and scientific literacy, making it a valuable addition to any genetics curriculum.

Before diving into the pedigree, we must establish the rules of the game. Blood typing is governed by three alleles: A, B, and O.

John has blood type A, which means his genotype can be either AA or AO. Since Mary has blood type O, her genotype must be OO. Could a Type AB father and a Type A mother have a Type O son

If you need help adjusting this key for a of the pedigree mystery lab or want me to draft a corresponding student worksheet , let me know! Please tell me: Do your materials include the Rh factor (+/-)?

The crime scene evidence includes a blood smear (Type A-) and the thief's trait of attached earlobes.

Provide a of a specific scenario if you can describe the parents' types. Explain the Rhesus ( +/−positive / minus ) factor implications for the mystery. Compare this to DNA profiling methods. Share public link Type AB father (IAIB) has no i allele to pass

Use this updated data table to cross-reference phenotypes and determine exact genotypes. Family / Individual Character Name Phenotype (Blood Type) Confirmed Genotype Mr. John Smith IAicap I to the cap A-th power i Mrs. Mary Smith IBicap I to the cap B-th power i The Davis Family Mr. Robert Davis IAIBcap I to the cap A-th power cap I to the cap B-th power Mrs. Susan Davis The Jones Family Mr. David Jones Mrs. Karen Jones IAicap I to the cap A-th power i The Children IAIBcap I to the cap A-th power cap I to the cap B-th power IBicap I to the cap B-th power i RRcap R cap R IBicap I to the cap B-th power i The Estate Mystery Grandfather (Deceased) IAIBcap I to the cap A-th power cap I to the cap B-th power , Genotype varies Grandmother Claimant (Grandchild?) Part 3: Step-by-Step Pedigree Analysis & Answer Key Problem 1: Matching the Mixed-Up Children

Conclusions:

To unlock the mystery, students must deduce the exact genotypes of Generation I by looking at their offspring in Generation II. 1. Generation I (The Grandparents) Must be Heterozygous IAicap I to the cap A-th power i . Proof: He passed a recessive allele and a recessive allele to his Type O- son. Grandmother (Type B-): Must be Heterozygous IBicap I to the cap B-th power i . Proof: She passed a recessive allele to her Type O- son, and she can only pass for the Rh factor. 2. Generation II (The Parents & Offspring) Uncle (Type O-): Genotype is . He inherited one from each parent. Father (Type AB+): Genotype is . He inherited IAcap I to the cap A-th power from the grandfather, and IBcap I to the cap B-th power from the grandmother. Mother (Type O-): Genotype is