1. [n]  (genetics) the process of locating genes on a chromosome
2. [n]  a function such that for every element of one set there is a unique element of another set

Mapping
Guides the amateur collector or mapmaker in the lore of maps and their working principles

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function

1. Determining the physical location of a gene or genetic marker on a chromosome. (See Continuous map, Genetic map, Physical map)
3. drawing a map showing the physical features of a community; usually an early step in a field project.