Related Clues:

• It has four bases
• Hereditary letters
• Evidence gathered by a CSI team
• Genetic marker, abbr.
• CSI sample
• Quick portrait
• Modernday evidence
• Type of forensic evidence
• Biological identifier
• Crime-lab specimen
• Letters from the family?
• Letters heard on "CSI"
• ''CSI ''clue
• Genetic template
• "CSI" test subject