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. So we have uppercase T, lowercase T, and this is how we describe this particular homologous chromosome with these corresponding alleles, these corresponding genes. So, upper case T represents dominant gene for that high trait. Lower case T represents recessive gene for that trait.