Index >> Genetic and Cytological Mapping of Chromosomes >> Difference Between Genetic and Chromosome Maps

Difference Between Genetic and Chromosome Maps
The frequency of crossing over usually varies in different segments of the chromosome, but is a highly predictable event between any two genes loci. Therefore, the actual physical distances between linked genes bears no direct relationship to the map distances calculated on the basis of crossover percentages. However, the linear order of linked genes is identical in both maps.
Uses of Genetic Maps
The genetic maps have following uses:
(i) The chromosome maps display the exact location, arrangement and combination of genes in a linkage group or chromosomes.
(ii) They are useful in predicting the results of dihybrid and trihybrid crosses.