Source: https://www.coursum3.org/lufr-5-sciences-du-sujet-et-de-la-societe/?wpdf_download_file=/home/ichigo1vs/www8/wp-content/uploads/cours/UFR5/D%C3%A9partement%20de%20Psychologie/l1/biologie/Biologie%20-%20Partie%20III%20-%20Les%203%20lois%20de%20Mendel%20(1).pdf