Genetic linkage analysis is the investigation of the co-inheritance of two or more genetic markers in a family. It is a valuable tool in the study of inherited genetic disorders. Other terms that can be used to describe this technique include linkage mapping, genetic mapping, and genetic linkage mapping. The term gene mapping is also sometimes used, but this can refer to both linkage analysis and physical mapping of genes on chromosomes. The basic principle of genetic linkage analysis is that genes that are physically close to each other on a chromosome are more likely to be inherited together. This allows researchers to identify genes that are associated with specific traits or diseases.