Now, in the case of the homozygous recessive plan, we have a short phenotype and we have a genotype equaling to lowercase T, lowercase T, where lowercase T is the gene that codes for proteins that expresses the short trait and not the toll trait. Now, every time he conducted this same experiment, he always found that the f one generation offspring was always tall. It was never short. The question is, what exactly is the genotype of this f one generation? Well, to determine what the genotype is, we have to determine what all the possibilities of that genotypes are. And to do that, we have to apply the punant square.