क्लोनिंग संवाहक (cloning vector) pBR322 पर मौजूद दो प्रतिजैविक प्रतिरोधी (antibiotic resistance) जीन किसके लिए होते हैं?

Insertion of a foreign DNA at the BamHI site in the E. coli cloning vector pBR322 results in the loss of antibiotic resistance towards:

Which molecular marker technique relies on non-specific random primers and may suffer from low reproducibility and intraspecific variation when used for species discrimination?