$$ extbf{Solution:}$$ $$ extbf{Part 1:}$$ TtRr X TtRr - $$ullet$$ The phenotypic ratio in F2 generation is:  9 (Tall, red) : 3 (Tall, white) : 3 (Dwarf, red) : 1 (Dwarf, white) $$ extbf{Part 2:}$$ $$ullet$$ The traits which are not found in the parental plants are expressed in the offspring; this can be explained through Mendel's Law of Independent Assortment. $$ullet$$ The law states that when two pairs of traits are crossed, the segregation of one pair of characters is independent of the other pair of characters.