The secret behind growing large tomatoes lies not in the fertilizer or the perfect soil conditions, but in just a few genetic changes that over time have resulted in tomatoes 1,000 times bigger than their wild ancestors

understand the genetic changes that allowed humans to transform wild tomatoes -- which are naturally about the size of a blueberry -- into modern varieties such as the beefsteak tomato, which can weigh a pound (half a kg)

changes that give rise to a large number of compartments or locules inside the tomato

take a beefsteak tomato from the supermarket and cut it open inside you`ll see these compartments in there that have wells between them. They may have anywhere from 10 to 20 of these compartments

Somehow, something made the plant start making these compartments, and by making more compartments, you can get larger fruit