And if we begin by assuming it's autosomal dominant, what that means is this individual here must either be uppercase B, uppercase B or uppercase B lowercase B. But this individual must be lowercase B lowercase B if we're assuming it's autosomal dominant. So remember, these two genotypes will express that phenotype for that disease, right? So we have disease phenotype, but only lowercase B. Lowercase B in this particular case will not express that phenotype. So that's why these are our phenotypes. And the same thing is true here.