Deciphering the unique DNA code of Homo sapiens has been an impossible task for scientists for many years. In 1990, the international research project “Human Genome” was launched, the result of which in 2003 was a complete description of the structure of the genome of the human species. It turned out that cells perceive the genetic code as a kind of general guide to action, and not a template that allows them to get the same result every time. Changes in the genome that do not affect the DNA sequence are dealt with by epigenetics - a progressive, dynamically developing branch of biology. Nessa Carey. The Epigenetics Revolution. How modern biology is rewriting our understanding of genetics, disease and inheritance