Chapter 11.3, Problem 2CC

Summary Introduction

To determine:

The types of blood group and their fractions seen in offsprings of a man with AB blood group and a woman with blood group O.

Concept introduction:

The ABO blood grouping system exemplifies multiple allelism and co-dominance. The alleles that determine the blood group are ${\text{I}}^{\text{A}}{\text{, I}}^{\text{B}}\text{ and i}\text{.}$ This shows multiple allelism as three alleles determine a character. Moreover, the alleles ${\text{I}}^{\text{A}}{\text{ and I}}^{\text{B}}$ are equally dominant on each other, thus, they are co-dominant.