In this lab activity, students type simulated blood to determine blood type. They then assign possible genotypes to individuals based on their blood type. They cross the parents to determine which baby is theirs. This allows for a discussion of blood typing, punnet squares, multiple alleles, and codominance.
Any simulated blood typing kit may be used. Just put masking tape over the bottle labels and relabel as follows:
Mr. Jones - type B
Mrs. Jones - type AB
Baby 1 - type O
Baby 2 - type A