Separate white and red bloodcells with a centrifuge.Extract DNA nuclei from the white blood cells. … Cut DNA strand into fragments using a restriction enzyme.Place fragments into one end of a bed of agarose gel with electrodes in it. … Use an electric current to sort the DNA segments by length.

What does a DNA profile include?

The biological material used to determine a DNA profile include blood, semen, saliva, urine, feces, hair, teeth, bone, tissue and cells.

How reliable is DNA profiling?

Only one-tenth of 1 percent of human DNA differs from one individual to the next and, although estimates vary, studies suggest that forensic DNA analysis is roughly 95 percent accurate.