(1992) Karen Garner preparing a gorilla hair for analysis using PCR (polymerase chain reaction). This hair is from Peanuts, a silverback male mountain gorilla (named by Dian Fossey) who died May 1, 1989, at about age 29. The study is being done to assess the level of genetic diversity in gorilla populations, to clarify gorilla classification at the subspecies level, and to develop methods for pedigree determination. The bands (black) on the autoradiograms show the sequence of bases in a sample of DNA. At the San Diego Zoo in California. DNA Fingerprinting..