single grain of rice 69 percent single grain of rice ngm.nationalgeographic.com Humans share around 25% of our DNA with grapes quite a bit of DNA 44 percent we're not so very different genetically linked genetically linked single grain of rice linkages are between all living organisms 73 percent sharing of genes sharing of genes single grain of rice genetically linked genetically linked genetically linked this article in National Geographic single grain of rice National Geographic Magazine: Genes Are Us. And Them.