When a pair of contrasting characters are crossed with each together then F1 generation has only one type of character. This expressed character is known as dominant character while the character which could not express in F1 generation is known as recessive character. In pea plants, tallness, round seed, yellow seed, purple flower, green pod, inflated pod and axial flower are dominant over dwarfness, wrinkled seed, green seed, white flower, yellow pod, constricted pod and terminal flower respectively.