Watermelon seeds are edible and contain trace amounts of iron, zinc and protein. A person would have to consume several hundred seeds to get 1 to 2 grams of iron or zinc. There is 1 gram of protein in 24 seeds.
In Asia, watermelon seeds are roasted, seasoned and eaten as a snack. They are also ground into flour and used to make bread. The rind of the watermelon is also edible.
Seedless watermelons have not been genetically engineered. They occur through hybridization when diploid and tetraploid watermelons are crossed. Diploid watermelons contain two sets of chromosomes, and tetraploid watermelon contain four sets of chromosomes.