Fig. 10. Types of Genome Maps.
At the coarsest resolution, the genetic map measures recombination frequency between linked markers (genes or polymorphisms). At the next resolution level, restriction fragments of 1 to 2 Mb can be separated and mapped. Ordered libraries of cosmids and YACs have insert sizes from 40 to 400 kb. The base sequence is the ultimate physical map. Chromosomal mapping (not shown) locates genetic sites in relation to bands on chromosomes (estimated resolution of 5 Mb); new in situ hybridization techniques can place loci 100 kb apart. This direct strategy links the other four mapping approaches. [Source: see Fig. 9.]
The Medical and Public
Health Law Site
The Best on the WWW Since 1995!
Copyright as to non-public domain materials
See DR-KATE.COM for home disaster preparation
Edward P. Richards, III, JD, MPH
Webmaster