And so what that means is we're going to have two different types of alleles in any given individual for this particular trait, the Abo blood group traits. Now, the question is, if we have a male individual with one blood group type and a female individual with a second blood group type, and these two individuals decide to make to produce an offspring, the question is, what exactly is the mode of inheritance of this particular trait? Does it follow the dominant or the complete dominance mode? Does it follow the incomplete dominance mode or does it follow something else. So in this particular case, we have a mode of inheritance known as codominance. So these three alleles that make up the Abo blood group trait in humans follow a mode of inheritance we called codominance.