If you sit down, lie down, and roll over, Beethoven's #DNA from a hair sample reveals surprises nearly two centuries after his death.
The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same in everyone.
DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms.
https://www.sciencealert.com/dna-from-beethovens-hair-reveals-surprise-nearly-200-years-later
An important property of DNA is that it can replicate, or make copies of itself. Each strand of DNA in the double helix can serve as a pattern for duplicating the sequence of bases.