Pack of 200 seeds, ideal for replacing the seeds from B8A19100 Rapid Cycling Brassica Kit or in your own Mendelian genetics experiments. Rapid Cycling Brassica rapa (syn. campestris) has been selectively bred to complete its life cycle quickly under conditions which can be easily set up in the laboratory. Rapid Cycling Brassicas need to be grown under 24 hour illumination from a bank of fluorescent lights.