The Story of the Seed

While the flowers of the plants didn't show many differences, the leaves showed much variation. Some were darker than others, some had different shapes, some were bigger/smaller than others, etc. The first plant we checked had leaves that measured 16cm x 14cm. The second one we checked measured 14cm x 8cm. The third we checked measured 26cm x 26cm. Nowadays, people can choose what plants to breed in order to get what they desire in a Brassica. This is called artificial selection.  For a breeder guarantee that they get the trait that they want in a plant, they must breed plants that already have this trait. This creates a purebred, guaranteeing they get their trait. The plants themselves, however, may have mutated  over time, altering their traits and genes.