If you are wondering if seedless grapes are one of the Gentically Modified Frankenfoods, they may or not be. Seedless grapes started out as hybrids, so they can be made without being genetically modified. The big factor is whether or not they are organic. If they are organic, there is not a chance that they will be GMO. If they are conventional, they may be GMO. In the U.S., GMO foods are not labeled, so you don't really know. Regardless, non-organic imported grapes almost always make the "Dirty Dozen" list of highest pesticide residues, so I always buy organic grapes anyway. So given you buy organic grapes, don't worry about the seedless variety being some sort of weird science experiment. Grapes are incredibly good for you, particularly the dark, deeply colored purple ones.