Similar: Heather Dewey-Hagborg's project http://deweyhagborg.com/strangervisions/

In Stranger Visions artist Heather Dewey-Hagborg creates portrait sculptures from analyses of genetic material collected in public places. Working with the traces strangers unwittingly leave behind, Dewey-Hagborg calls attention to the impulse toward genetic determinism and the potential for a culture of genetic surveillance.