Lab Activity Blood Type Pedigree Mystery Answer Key Upd !!exclusive!!
In rare clinical cases, individuals may possess the genes for Type A, B, or AB blood but test as Type O. This is known as the Bombay Phenotype. It occurs when a person lacks the H substance , a foundational molecular structure required for A and B antigens to attach to red blood cells. In advanced lab activities, this serves as an excellent example of epistasis.
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
Danny needed the money to win back his ex-wife (based on the lab's character descriptions). 🔍 Fundamental Concepts for Review 1. ABO Blood Type Inheritance
This article serves as an to the common scenarios, helping instructors and students navigate the complexities of this engaging lab. 1. The Scenario: A Family Mystery
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 lab activity blood type pedigree mystery answer key upd
Answer: Either an IAcap I to the cap A-th power IBcap I to the cap B-th power allele. He cannot pass down an
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While specific classroom datasets may vary, most "Blood Type Pedigree Mysteries" follow a similar logical trap. Below is a common dataset and the answer key logic used to resolve it.
Note: Results may vary slightly depending on the specific version of the lab handout (e.g., Scribd version or Course Hero version ), but the foundational genetic logic remains the same. 1. The Pedigree Structure The family includes: Joseph (deceased) and Rita. Generation II: Their children (e.g., Sarah, Danny, etc.). Generation III: Grandchildren. 2. Blood Type and Genotype Analysis In rare clinical cases, individuals may possess the
Both follow simple Mendelian inheritance . Rh+ ( ) and Free earlobes ( ) are dominant; Rh- ( ) and Attached earlobes ( ) are recessive. 3. Solving the Mystery
How does codominance differ from traditional dominant/recessive traits? Common Student Misconceptions Thinking Type AB parents can have Type O children. Correction: Remind students an AB parent has no Mistake: Assuming Type A always means a genotype of IAIAcap I to the cap A-th power cap I to the cap A-th power
Note on Advanced/Updated Variations: In updated versions of this lab, a third family or historical grandparent data is introduced to resolve the puzzle. If confined strictly to these two families, family can biologically claim Baby X if Mr. and Mrs. Jones are the confirmed parents.
If you want, I can adapt this answer key to the exact pedigree in your lab (provide the phenotypes for each labeled individual) and produce Punnett squares and probability calculations. In advanced lab activities, this serves as an
To find the total probability of the Father and Mother having a child who is , multiply the individual probabilities:
The crime scene evidence includes a blood smear (Type A-) and the thief's trait of attached earlobes.
) and tracking them through a pedigree, you can solve any familial, medical, or legal scenario presented in the lab.
Before revealing the answer key, we must align on the updated (UPD) genetic rules. The old keys sometimes ignore the or Bombay phenotype , but for standard high school level, we stick to the core rules: