Answer:TT (tall plant)
Explanation:
When a Tall plant (TT) is crossed with tt (Short plant) all the offspring will be tall because T is dominant over small t. This happen in the first filail generation.
TT×tt
Tt Tt Tt Tt- all tall pea plant.
Complete dominant occurs when a dominant allele expresses itself over a recessive allele such that the phenotype expressed is of the dominant traits.