How "DNA" testing works

The governors of the other states that allow the death penalty apparently think it works adequately.DNA testing will help.The tools for solving rapes and murders have improved rapidly.Five years ago DNA tests couldn’t link suspects to hair or semen found on a victim.Today a crime lab can identify unique DNA patterns in a tiny sample of just 100 to 200 cells.Every cell is a unique library of DNA sequences.The goal is to find out if the forensic and suspect’s samples match.A sample mixed with 13 primers multiplies into millions of distinctive molecules.Exposed to an electrical current, the molecules a sorted into color-coded bands on a gel.If samples do, odds that they’re from one person are overwhelming.