Recombinant DNA
For gene probes to be useful they must

be labeled in some manner to allow detection
be large enough to contain gene-specific sequences
None of these
both (a) and (b)

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Recombinant DNA
Vectors are

molecules that degrade nucleic acids
molecules that protect host cells from invasion by foreign DNA
molecules that are able to covalently bond to and carry foreign DNA into cells
molecules that help in replication

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