Match the following characters with their contrasting traits of Pea plant.
Column-I Column - II
A. Stem height 1. Axial/terminal
B. Flower position 2. Round/wrinkled
C. Pod shape 3. Tall/dwarf
D. Seed shape 4. Inflated/constricted
A - 3, B - 1, C - 4, D - 2
Mendel selected seven pairs of contrasting characters in Pea plant for his experiments. They were stem height, flower position and colour, seed shape and colour, and pod shape and colour. Stem height was considered to be either tall or dwarf, flower position was either axial or terminal, pod shape either inflated or constricted and seed shape either round or wrinkled.