So all these fragments will move along the same direction, but they will move at different speeds. And that's because if we examine the gel inside this setup, that gel is basically a special type of polymer that contains many different pores. And these pores basically contain a certain size to them. And so the larger DNA fragments, the larger molecules will find it more difficult to move along these pores, while the smaller fragments will find it easier to move along and through these pores because of their smaller physical size and smaller physical weight. So in gel electrophoresis, different fragments are separated on the basis of physical size. The larger molecules are not able to move as quickly as the smaller ones through the pores of that gel.