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.
If you are an educator looking beyond the answer key, here is how to (update) this classic lab for modern classrooms. lab activity blood type pedigree mystery answer key upd
Three babies were born on the same night in a busy municipal hospital. Unfortunately, their identification bands were misplaced. The hospital staff must use blood typing and pedigree charts of the parents to correctly assign each baby to their biological family. The Suspects (The Babies) Baby 1: Type O ( Baby 2: Type AB ( IAIBcap I to the cap A-th power cap I to the cap B-th power Baby 3: Type B (Possible genotypes: IBIBcap I to the cap B-th power cap I to the cap B-th power IBicap I to the cap B-th power i The Families (The Parents) Family Jones: Mother: Type A Father: Type AB Family Smith: Mother: Type O Father: Type O Family Brown: Mother: Type B Father: Type A Part 3: Step-by-Step Pedigree Analysis & Answer Key The new key requires students to write out
The Mystery Solved: Eleanor only carries alleles and cannot pass an IAcap I to the cap A-th power IBcap I to the cap B-th power If you are an educator looking beyond the