Could this method or the sample affect the poll's results?

CNN: Student News Learning Activity: Polling

However, the method allows a much, much smaller sample to be used.

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What method will you use to poll your sample?

CNN: Student News Learning Activity: Polling

The DNA method works slightly differently, in that the sample and the particles are treated with chemicals that cause DNA to stick promiscuously to the particles.

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If the antibody method is being used, the tester deposits a droplet of sample fluid that has been seeded with magnetic particles coated with the appropriate antibodies onto the chip's surface.

ECONOMIST: Labs on a chip