The offspring can either be blood group A B in this case, blood group A as in this case, or blood group B, as in these two cases. So there is a 50% chance of having a child that is blood group B. There is a 25% chance of having blood group A and a 25% chance of having the individual that is blood group AB. So this is what we mean by code dominance in Codominance. Neither of the traits is dominant over the other one. And in heterozygous individuals like this one here, both of those genes are actually expressed.