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  • Rights: © Dr Jeff Upton, Canterbury Health Laboratories, Christchurch, New Zealand Published 3 September 2009 Size: 27 KB Referencing Hub media

    A simple genetic test for lactose intolerance uses DNA from blood samples, which is amplified and digested with restriction enzymes. The pattern of DNA fragments indicates whether a person is lactose intolerant (C/C) or lactose tolerant (C/T or T/T).

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