For two generations, the Rh blood group was studied in ten diiferent Colombian regions to characterise the Colombian population for the CcDdEe complex in the Rh blood group. These regions proved to be genetically homogenous for the Rh factor, whereas the CcDdEe complex and co-dominant Cc and Ee systems were shown to be heterogenous. The preponderance of different races in the Colombian population was thus detected by using CCD-EE, CcD-Ee, CCddee, Ccddee, ccD-ee, ccddEe and ccddee phenotypes.
