At first blush, the new strawberry looks much like other wild strawberries that grow throughout Washington, Oregon and California, says Kim Hummer, the USDA biologist who discovered the berry. Genetically, however, it's quite different. It has 10 sets of chromosomes, unlike other wild strawberries in the area, which have only eight. In fact, the only other 10-chromosome wild strawberry that scientists have identified grows on one Russian island northwest of Hokkaido, Japan. Grocery store strawberries have eight sets of chromosomes.