And to see what we mean, let's consider the following example. Let's suppose we have an individual, let's say a male individual that has both alleles for this particular allele. And the female individual has both alleles for this particular allele. And so when those two individual mates, they basically produce a Zygote and offspring that contains the following homologous pair. And so what that means is one chromosome will contain this gene, this allele, and the other chromosome will contain this allele. And in this particular heterozygous individual, because the mode of inheritance is codominance, what that means is both protein A and protein B will be expressed, will be produced and will be found on the membrane of red blood cells.