(i)

The dwarf traits of the plants is not expressed in the presence of the dominant tall trait.

Tall : Dwarf = 3 : 1 ratio
(ii) In the F2 generation, both the tall and dwarf traits are present in the ratio 3 : 1. This showed that the traits for tallness and dwarfness are present in the F1 generation, but the dwarfness, being the recessive trait does not express itself in the presence of tallness, the dominant trait.