Hello Kadir,
Johann Gregor Mendel (1822-1884), father of genetics, work on the garden pea (Pisum sativa) and discovered the law of inheritance. There are 3 law which together forms the Mendel Law's of Inheritance:-
At that time, Mendel's law is not appreciated until 1900 where 3 scientists rediscovered his work.
Hope it's help!!
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