Researchers have developed a way to print DNA. As this ScienCentral News video explains, that might one day make genetic testing as cheap and as accessible as a blood test.

Cheap DNA Tests
Handy genetic tools, called microarrays, have allowed scientists to delve into the genetic material that makes each of us who we are. With the ability to run tens of thousands of genetic experiments in parallel on a small glass slide, DNA microarrays have offered better understanding of genetically-based illnesses, like Huntington's and cancer, identifying red flags for those diseases in our DNA, and finding clues to help fight them, including targets for new drugs.

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http://www.sciencentral.com/articles/view.php3?type=article&article_id=218392627