No, absolutely not. Employers should be barred by law from asking such a personal question or conducting such a test regardless if mandatory or voluntary. What if you don't like Armenians, or Jews, or blacks, or Gypsies, or ... pick anything that could be determined a "DEFECT" and were denied employment or promotion or life, you pick any form of discrimination you like and place it here. This is a horrific thought. Anyone for a taste of soylent green?! The corporations will be in control. Selective hiring?! Only blond hair and blue eyes get hired. If you are not perfect according to corporate policy you become unemployable?! Where is this going????? Could a person be fired for marrying a person the corporation did not accept genetically because of the "possibility" future children might develop health problems?