And the question we want to ask ourselves is what experiment can we conduct with this plant that we are given that will help us determine exactly what the genotype of that plant is with the tall phenotype? Now, the first question we want to ask ourselves what are all the possibilities for a genotype that will produce a tall phenotype? So we know there are two possibilities. 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.