Sooner than we think, we will have access to our own genetic codes. Are we ready to join the DNA generation? Two ASU researchers, Gary Marchant and George Poste, will tackle legal and ethical dilemmas surrounding personalized medicine on “Arizona Horizon” at 5:30 p.m., March 28, on Eight, Arizona PBS. That same evening, Eight will premiere the new NOVA program “Cracking Your Genetic Code” at 8 p.m.