Determining the base sequence of the DNA molecule, the genetic material of heredity has been the focus of much biological research since the middle of the last century. The determination of the sequence of the DNA molecule has been called sequencing. The first widely used sequencing technique was Sanger sequencing, which was introduced in 1977 and dominated the market until the early 2000s. Subsequently, several new, more accurate, faster, and cheaper sequencing techniques appeared. As a result, sequencing methods, such as cancer therapies, have also started to be used in medicine.  Kulcsszavak: dezoxiribonukleinsav (DNS), Humán Genom Projekt, Sanger-szekvenálás, új generációs szekvenálások, személyre szabott orvoslás, rák