Name the plant Mendel used for his experiment. What type of progeny was obtained by Mendel in F1 and F2 generations when he crossed the tall and short plants? Write the ratio he obtained in F2 generation plants. (Delhi 2019)

Mendel decided to conduct a series of hybridization experiments on the garden pea (Pisum sativum).
He first selected two pure line plants—a tall plant with the gene TT and a short plant with the gene TT—and crossed them to create new plants with contrasting characteristics. He saw that only one of the two opposing characters manifested in the F1 generation; he designated this character as dominant, and the other, which did not manifest in F₁, as recessive. Later, when he selfed the F₁ plants, he noticed that both features appeared in the following generation, but in a specific proportion. 

This can be explained by the following cross :

Therefore, all of the plants in the F₁ generation will be tall, and after selfing, Mendel found that the proportion of tall to dwarf plants in the F₂ generation plants is 3:1.