Dwarf pea was treated with gibberellic acid. It became as tall as tall pea plants. If these pea plants are crossed with pure tall plants, what will be the phenotype ratio in F₂ generation ?

Treatment with gibberellic acid might change phenotype of a plant but not genotype so even after treatment of a dwarf plant with gibberellic acid. Though it becomes as tall as pea plants, its genotype would still be ‘tt’ when that is crossed with pure tall plant whose genotype  is ‘TT’, phenotype ratio in F₂ generation is 3:1.