What did Gregor Mendel do to study different characteristics in his genetics experiments? like what type of organism and what type of cross?

Pioneer of genetics botanist, in his work on the plants, has found that transferred to the next generation will inherit the properties of a species. Mendel's principles as suggested, then confirmed by experiments conducted in the early 20th century, determining the validity of the theory of heredity for all living things, has become one of the fundamental principles of biology.