[Hacklehead]

Modern technology can amplify and detect shockingly small amounts of DNA. In fact you are constantly shedding detectable amounts of DNA everywhere you go. If someone brushes against you they often leave their DNA on your clothing.

[verum ago]

Modern technology can amplify and detect shockingly small amounts of DNA. In fact you are constantly shedding detectable amounts of DNA everywhere you go. If someone brushes against you they often leave their DNA on your clothing.

I know. I work in a DNA Phylogenetics lab. We use obscenely small amounts of DNA, and most it is contaminated with bacterial, protist, plant, fungal and animal DNA (we're going after fungal right now). Our basic PCR cycle, if working with 100% efficiency, would amplify the DNA 2⁵⁰ times.