It's either heterozygous tall or it's homozygous dominant tall. So what that means is the phenotype is either uppercase T, lowercase T, in which case this is the heterozygous toll plan, or it can also be homozygous dominant uppercase T, uppercase T both of these genotypes will produce a tall phenotype. Now, lower case T lowercase T will not produce a tall phenotype. It will produce a short phenotype. And that is precisely why we can basically cross this one out. So now we can narrow it down to one of these two cases.