CODIS usats

CODIS (Combined DNA Index System) Microsatellite loci

The standard human DNA forensic testing set used by the FBI and RCMP comprises 13 loci [boxes in grey and blue], all but two of which are located on separate chromosomes. The observed range of variation at these loci is sufficient that the probability of any two individuals showing the same pattern at all 13 loci is <1 / 10¹⁵, more than five orders-of-magnitude less than current human population of 6 x 10⁹. The CODIS set does not include microsatellite loci on the X- and Y-chromosomes, which are typed simply by X- and Y-specific markers.