Bananas did have seeds at one time. But the seeds made them hard to eat. So the people who grew the kind of bananas that we like to eat found a way to make them without seeds. Even now there are still some types of bananas that have seeds. In fact many varieties of wild bananas growing in Southeast Asia and other warm areas have large seeds from which new plants are generated. But the seedless cultivated bananas are planted from cuttings. Seedless grapes are produced by dipping their flowers into a chemical. In a similar manner watermelons are rendered seedless by chemically treating their seeds.