Alleles represent slight variations in the coding of genes that give people different characteristics. People who have a long form of the DRD4 gene, such as the 7R allele, are more likely to take risks. They pursue new experiences because they have a low tolerance for boredom. They like to explore new places, ideas, foods, drugs, and sexual opportunities. They are adventurers. Worldwide about one in five people have the 7R allele, but there’s substantial variation from place to place.
