During a period of two decades spanning over 1980 to 2000, a broad range of molecular markers became available, which are being used in a variety of ways.
A large number of acronyms for these molecular markers are in common usage now.
The major uses of these molecular markers is the development of molecular maps, that will be described in for humans and animal systems and for a variety of plant systems.
Only the basic principles and methods involved in the development and uses of these molecular markers will be discussed, since they are common to all kinds of organisms.
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