An example of the Mendelian trait (proposed by Gregor Mendel) in the culinary pea: distribution of seeds in F2 generation of a cross between green and yellow peas. The yellow peas are black, green peas are outlined only. Gregor Mendel (1822-1884) a Czech scientist, Augustinian friar and abbot of St. Thomas' Abbey in Brno, Margraviate of Moravia. Dated 20th century.