It has been suggested that this article or section be merged with Genetic Map, but this suggestion is disputed. (Discuss)

A physical map, in genetics, tells you how much DNA separates two genes and is measured in basepairs, as opposed to a genetic map which tells you the positions of genes in relation to each other based on the frequency of crossing overs. The distance of a physical map is measured by what is called base pairs. Wikipedia does not have an article with this exact name. ... Genetics (from the Greek genno γεννώ= give birth) is the science of genes, heredity, and the variation of organisms. ... The general structure of a section of DNA Deoxyribonucleic acid (DNA) is a nucleic acid —usually in the form of a double helix— that contains the genetic instructions specifying the biological development of all cellular forms of life, and most viruses. ... This stylistic schematic diagram shows a gene in relation to the double helix structure of DNA and to a chromosome (right). ...