Recombinant DNA
For gene probes to be useful they must

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

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Recombinant DNA
Agrobacterium tumefaciens is

a disease in humans that causes loss of sight
a disease in humans that causes loss of weight
a bacterium that can be used to introduce DNA into plants
a fungi that is used to produce antibiotics in large amounts

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