So let's suppose that you are given a plant, and the only piece of information you have about the plant is the phenotype of that plant. So you know that the plant is tall. Now, we don't actually know what the genotype of that plant is. 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.