Mendel conducted  artificial pollination/cross pollination experiments using several  true-breeding pea lines.Mendel choose pea plant for his investigations because of the following reasons

a) pea is naturally self pollinating but can be easily cross pollinated.

b)characters in the garden pea plant are manifested as two opposing traits, e.g., tall or dwarf plants.

c) in less space more plants can be grown.

d) life span is short hence many generations can be observed.