what is dna probe
DNA probe. 1. a laboratory-produced quantity of a known segment of labeled DNA that is used for finding matching DNA in a biological sample, as blood or hair, by the base-pairing of strands from both sources.2. a search or examination with such a DNA segment.1  Facebook.. a laboratory-produced quantity of a known segment of labeled DNA that is used for finding matching DNA in a biological sample, as blood or hair, by the base-pairing of strands from both sources. 2. a search or examination with such a DNA segment. 1  Facebook.