Prospects for a complete molecular map of the human genome

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Abstract
Linkage maps are limited by the number of recombinations that can be scored in human pedigrees to a resolution of ca. 1 centimorgan (relative distance between genes on a chromosome having a crossover value of 1 %) which is estimated to be about 10 megabases. Molecular maps can be formed at any resolution down to the base sequence. To complement the linkage approach, the most useful molecular map would be one that helped to locate disease loci, by using restriction fragment length polymorphisms (RFLPS) and accurate localization of recombinations, and which then helped to find candidate genes in this region, by providing the positions of coding sequences. This paper discusses the appropriate form and scale of such a map, how it can be produced with methods now available, and the most efficient strategy for building the map, based on present knowledge of the organization of the human genome.