What is a linkage test?
Linkage is the tendency for genes and other genetic markers to be inherited together because they are in close proximity to each on the same chromosome. A linkage or linked marker test selects a segment (or segments) of DNA at a location on the chromosome and tracks their inheritance. Because DNA segments that lie near each other on a chromosome tend to be inherited together, these markers can be used to track the inheritance pattern of a gene that has not yet been identified but whose approximate location is known. You can read more about genetic linkage at Wikipedia.
