Answer:
Tall (Tt).
Explanation:
Mendel has explained the laws of genetics and is also known as the father of genetics. Mendel explained the law of independent assortment, concept of dominance and law of segregation.
The cross has been done between the tall plant ( TT) and the dwarf plant (tt) the genotype of the offspring is Tt ( all tall plants). Their cross can be shown as follows:
Parent TT × tt
Gamete T × t
F1 generation Tt ( all tall plants).
Thus, the plant genotype is Tt.