Let's suppose on chromosome number one, this chromosome, this gene is a dominant gene, and this is a recessive gene. And the way that we describe this situation here without actually drawing out these chromosomes is by using the following symbolism. So, the uppercase T basically describes this gene that is dominant for that trait, the height trade. And since we're talking about height, we use T to designate tall. So uppercase T is tall, and lowercase T is short. So uppercase T basically means it codes for proteins that expresses the tallness trait, while the lowercase T codes for the proteins that expresses the shortness trait in that particular Pplant organism.