IB Biology HL 2.5.9 ABO inheritance and antigen evidence Question Bank

a. i and I ${ }^{\mathrm{A}}$ and $\mathrm{I}^{\mathrm{B}}$ are alleles (of the blood group gene)

b. $I^{A}$ is dominant and i is recessive $/ I^{B}$ is dominant and i is recessive

c. Group O (only) with ii and Group A with $\mathrm{I}^{\mathrm{A}} \mathrm{i}$ or $\mathrm{I}^{\mathrm{A}} \mathrm{I}^{\mathrm{A}} /$ Group B with $\mathrm{I}^{\mathrm{B}} \mathrm{i}$ or $\mathrm{I}^{\mathrm{B}} \mathrm{I}^{\mathrm{B}}$

d. $\mathrm{I}^{\mathrm{A}}$ and $\mathrm{I}^{\mathrm{B}}$ are co-dominant so Group AB with $\mathrm{I}^{\mathrm{A}} \mathrm{I}^{\mathrm{B}}$

e. one allele/copy of the gene inherited from each parent/Punnett square showing this

Disallow mpa if allele notation is incorrect (such as using different letters for different alleles) but allow other mps. The notation I' can be accepted instead of i Reject blood groups or types being dominant/recessive - it should be alleles.

4 max