So in this particular case, we're going to have both of the chromosomes that contain the allele that codes for protein B. But in this case, we're only going to have one of the two chromosomes that contains that allele that codes for protein B. So these are the three different types of phenotypes of the offspring. 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.