Multiple choice The number of contrasting characters studied by Mendel in the pea plant were 8 pairs 7 pairs 6 pairs 5 pairs Reveal answer Fill a bubble to check yourself B Correct answer Explanation Gregor Mendel studied 7 pairs of contrasting characters in pea plants including plant height, seed shape, seed color, pod shape, pod color, flower position, and flower color. These 7 traits formed the foundation of his inheritance experiments.