Lab Activity Blood Type Pedigree Mystery Answer Key Upd !!link!!
Circles (females), Squares (males), shaded (affected/specific phenotype), and lines (marriage/descent). III. The Lab Activity: Data Collection Note: This data is standard for this type of lab activity. 1. The Families Family 1: Mr. Smith ( ), Mrs. Smith ( Family 2: Mr. Jones ( ), Mrs. Jones ( 2. The Babies Baby 1: Type O Baby 2: Type AB 3. The Pedigree Data Family 1 (Smiths): Parents , child is Baby 1 (O). Family 2 (Jones): Parents , child is Baby 2 (AB). IV. Lab Activity Blood Type Pedigree Mystery Answer Key UPD Step 1: Determine Genotypes of Parents Family 1 (Smiths): Since both parents are Type A (
The ABO blood type in humans is determined by a single gene (the I gene) that comes in three different versions (alleles):
Do not try to guess by looking at the pedigree.
antigen is the molecular precursor base upon which A and B antigens attach. If an individual is homozygous recessive ( lab activity blood type pedigree mystery answer key upd
Depending on your course level (General Biology vs. AP/Advanced Genetics), the answer key accommodates two distinct conclusions for Leo’s true identity:
The patriarch, Arthur Montgomery, was an uncompromising man with blood type A. His wife, Eleanor, possessed the rare and elusive blood type O. By all the laws of basic Mendelian genetics, their children should have been either type A or type O. Yet, their youngest daughter, Clara, was sitting in the clinic with a confirmed blood type of AB.
: Do not accept phenotypes (e.g., "Type A") where genotypes (e.g., " IAicap I to the cap A-th power i Smith ( Family 2: Mr
The pedigree should show Mr. and Mrs. Smith (heterozygous A) connected to Baby 1 (O).
of the recessive Rh- allele. They have a 25% chance of having an Rh- Teacher Tips for Grading
According to the Punnett Square above, the biological children of a Type A (Heterozygous) father and a Type O mother can only be: The Inheritance Patterns
In a typical blood type pedigree, we assume that every person inherits one allele for a gene from each parent. UPD can break this rule in two main ways:
). This means each parent must have contributed a recessive ' ' allele. Therefore, both parents must be IAicap I to the cap A-th power i (Type A) rather than IAIAcap I to the cap A-th power cap I to the cap A-th power VI. Common Student Pitfalls Remind students that Heterozygous Type A ( IAicap I to the cap A-th power i ) is very common.
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:
IAIBrrcap I to the cap A-th power cap I to the cap B-th power r r iirri i r r (Suggests A- IAirrcap I to the cap A-th power i r r Grandchild A- IAirrcap I to the cap A-th power i r r 🔑 Key Answers & Explanations 1. The Inheritance Patterns
