Nature versus nurture.
A few years ago Carole Meredith, professor at U.C. Davis, announced that DNA analysis revealed the Italian grape Primitivo was identical to California Zinfandel, a grape variety whose origins have long stumped researchers. Dr. Meredith along with Dr. Maletic and Dr. Pejic of the University of Zagreb began exploring the Dalmatian Coast of Croatia in 1998 to gather information about ancient wine grapes. In the fall of 2001 the team’s efforts paid off when they discovered a Crljenak kasteljanski vine. This tongue tickler also proved to have DNA identical to Zinfandel. Dr. Meredith is still searching for Zinfandel’s Mom and Pop. "Zinfandel may be so old that its parents are no longer grown anywhere," she speculates. Here at Navarro we acknowledge that Italian Primitivo, Croatian Crljenak kasteljanski and Mendocino Zinfandel may share the same DNA and genotype but we don’t buy that they are the same phenotype.
"We’ve already figured out that Zin is the parent of Plavac mali,
a famous Dalmatian grapes that is thought to be ancient, so Zin must be even older," according to Professor Carole Meredith. Grape genealogy is as interesting as human genealogy. Aaron and Sarah Cahn Bennett share Ted’s and Deborah’s DNA, but we hope Simon the dachshund doesn’t. 
