Lab Activity Blood Type Pedigree Mystery Answer Key Upd -

Assume pedigree labels: Grandparents (G1, G2), Parents (P1, P2), Children (C1–C4). Observed phenotypes:

Probability=12 (Type B)×12 (Rh-)=14=25%Probability equals one-half space open paren Type B close paren cross one-half space open paren Rh- close paren equals one-fourth equals 25 % Part 3: Common Student Misconceptions & Troubleshooting

This lab activity effectively demonstrates how blood typing, while not providing a unique genetic fingerprint like DNA testing, can definitively rule out parents and prove parentage through Mendelian inheritance patterns.

The key to the mystery is identifying the genotypes of family members based on their blood types (phenotype). Means both parents must carry a lowercase Type AB ( IAIBcap I to the cap A-th power cap I to the cap B-th power ): Means the child must have received IAcap I to the cap A-th power from one parent and IBcap I to the cap B-th power from the other. Individual Joseph IBicap I to the cap B-th power i IBIBcap I to the cap B-th power cap I to the cap B-th power IBcap I to the cap B-th power Rita 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 IAcap I to the cap A-th power Danny IAicap I to the cap A-th power i Often the key suspect due to heterozygous genotype. Other Offspring Must match parent/grandparent alleles. 3. The Thief Identification (Most Common Solution) lab activity blood type pedigree mystery answer key upd

Because Family 1 parents are both IAicap I to the cap A-th power i , they can produce an (Type O) child ( from mother + from father). Baby 2 (Type AB) belongs to Family 2. Because Mrs. Jones is ABcap A cap B IAIBcap I to the cap A-th power cap I to the cap B-th power ), she can pass on either an allele, making it possible to have an ABcap A cap B V. Final Answers (Answer Key) Which baby belongs to the Smith Family? Answer: Baby 1 (Type O) Reasoning: IAicap I to the cap A-th power i IAicap I to the cap A-th power i can produce an (Type O) child. Which baby belongs to the Jones Family? Answer: Baby 2 (Type AB) Reasoning: Mrs. Jones ( IAIBcap I to the cap A-th power cap I to the cap B-th power ) can produce an AB child, whereas the Smiths cannot. Pedigree Diagram Explanation:

A pedigree is a diagram that uses standardized symbols to show the inheritance of a trait (like blood type) through multiple generations of a family. Assume pedigree labels: Grandparents (G1, G2), Parents (P1,

Before diving into the mystery, students must master the underlying genetics of the ABO blood group system. The ABO blood type trait is controlled by a single gene with three common alleles: IAcap I to the cap A-th power IBcap I to the cap B-th power IAcap I to the cap A-th power IBcap I to the cap B-th power

Two babies were born at the same time, but in the chaos, they were mixed up. The lab's purpose is to look at the blood types of the parents and the babies to determine which baby belongs to which parents using a pedigree chart. II. Background Knowledge To solve this mystery, students must understand:

Follows codominance (A and B are both expressed) and multiple alleles (A, B, and O). Means both parents must carry a lowercase Type

Below is a guide to the correct solutions for the lab activity, designed to help educators or for students to check their understanding after completing the exercise.

If a Type A parent has a Type O child, that parent's genotype is IAi (Heterozygous).