Lab Activity Blood Type Pedigree Mystery Answer Key Upd ((exclusive)) Online

Highlight how carriers hold the hidden recessive To help me tailor this resource, let me know if you need: A printable student worksheet version Alternative clues or storylines Grading rubrics for lab reports Share public link

The new key requires students to write out possible parental genotypes. For instance, if a mother is type A (genotype unknown) and a father is type B (genotype unknown), the key shows all four possible Punnett squares (A × B, A × BB, AA × B, AA × BB) before concluding that a type O child is impossible only if both parents are homozygous (AA and BB). This teaches that phenotype does not always reveal genotype—a critical lesson in genetics.

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Type AB parents can only produce AB, A, or B offspring; they can never produce an O child.

Phenotype is Type A . Her genotype is initially either 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 . (See Generation III to confirm). Generation III Analysis (Solving the Mystery) Case 1: Fiona (David & Grace's Daughter) Fiona (III-2): Phenotype is Type O , meaning her genotype is . The Verdict: For Fiona to be , she must inherit one allele from David and one allele from Grace. We already knew David was IBicap I to the cap B-th power i . This definitively proves that Grace’s genotype is IAicap I to the cap A-th power i Highlight how carriers hold the hidden recessive To

Blood Type Pedigree Mystery lab, students use the ABO blood group system

Blood type is a "Multiple Allele" trait that also shows . Type A: Genotype AAcap A cap A (Dominant) Type B: Genotype BBcap B cap B (Dominant) Type AB: Genotype ABcap A cap B (Codominant — both show) Type O: Genotype (Recessive — must have two 2. The Rh Factor (+/-) Rh+ is Dominant: Genotypes ++positive positive +−positive negative Rh- is Recessive: Genotype −−negative negative (must have two negatives) 3. Earlobe Attachment Free Earlobes: Dominant ( Attached Earlobes: Recessive ( This public link is valid for 7 days

Here are some basic points about blood type genetics that might help in solving a pedigree mystery:

The Rh factor (+ or -) is inherited via simple complete dominance. The positive allele ( ) is dominant over the negative allele (