An organism's total set of DNA is called its genome. Essentially each single cell within the body contains a total duplicate of the around 3 billion DNA base sets, or letters, that make up the human genome. With its four-letter dialect, DNA contains the information needed to construct the whole human body. A quality customarily alludes to the unit of DNA that carries the informational for making a particular protein or set of proteins. Each of the assessed 20,000 to 25,000 qualities within the human genome codes for an normal of three proteins. Located on 23 sets of chromosomes pressed into the core of a human cell, qualities coordinate the generation of proteins with the help of proteins and flag-bearer atoms.