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NEW YORK (Reuters) - A mobile DNA testing facility that looks more like a motor home than a medical clinic is raising questions about the ramifications of quick and easy tests to determine paternity and other biological connections.

Once a time-consuming and complicated process, DNA testing has become so accessible that experts worry families and individuals may not be properly prepared for the results.

A 28-foot (8.5-meter) recreational vehicle cruising around New York City emblazoned with the question "Who's Your Daddy?", and offering on-the-spot DNA testing services starting at $299, has renewed those concerns.

The clinic, operated by a New York company called Health Street, started in 2010 but was revamped two months ago.

Passersby can hail the conspicuous brown and blue Winnebago to have DNA samples taken by a technician, packaged and sent to a laboratory in Ohio. Results are returned within three to five business days. Mandatory prescriptions for the tests from a customer's physician can be faxed via the Internet to the RV.

While it is common for DNA testing distributors, companies who take the samples and...