Human genetic analysis. Conceptual computer artwork of a human passing through a scanning device, representing human genetic analysis for health and medical purposes. Part of a molecule of DNA (deoxyribonucleic acid) can be seen (blue). DNA carries the genetic code. It contains the instructions necessary to make every living organism. DNA is studied by taking samples from body tissues and fragmenting and arranging the DNA to find the genetic code. This aids the understanding of genetic diseases, such as cystic fibrosis. Also, as each individual has a different DNA code, studies can be used for identifying people in genealogy and forensic science.