Genetic mapping is the process of measuring the distance between two or more loci on a chromosome. In order to determine this distance, a number of things must be done. First, the loci (pronounced "low-sigh") have to be known, and alleles...

A map, or mapping, is a rule, often expressed as an equation, that specifies a particular element of one set for each element of another set. To help understand the notion of map, it is useful to picture the two sets schematically, and map one onto the...

Overlapping genes are defined as a pair of adjacent genes whose coding regions are partially overlapping. In other words, a single stretch of DNA codes for portions of two separate proteins. Such an arrangement of genetic code is ubiquitous. Many...

Restriction mapping is a technique that utilizes the ability of restriction enzymes to selectively cleave DNA to obtain a map of the order of the restriction sites. The pattern of the sites, and so the sequences of DNA they have recognized, can be used...

A contig is a continuous region of a gene, chromosome, or genome that is derived from a set of overlapping clones or sequenced fragments of DNA. Contigs are used to help in the construction of a physical map of various genomes, including the map of the...

Gene mapping is the creation of a genetic map assigning DNA fragments to chromosomes. When a genome is first investigated, this map is non existent. The map improves with the scientific progress and is perfect when the genomic DNA sequencing of the...