Answer:
Mendel used pea plants in his experiments because of the following reasons.
The generation time of the pea plant was very short so it was helpful for Mendel to produce many generation of pea plant in a very short interval of time.
They showed two different forms of many characters such as seed shape. Example: The seed showed two forms round and wrinkled.
So, these were the reasons why Mendel used pea plants for his experiment.