Just as RAW photo files contain all the information you need to put together a photograph, DNA contains all the information needed for a human being. Information artist and PhD student Heather Dewey-Hagborg has a fascinating portrait project that explores this idea.
Dewey-Hagborg finds and photographs DNA samples out in public, collecting everything from hair to chewed gum and cigarettes. She then sequences the DNA, extracting information about certain traits related to outward appearance (e.g. gender, eye-color, ancestry).