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gene alogical
gene amdahl
gene amplification
An amplificon is a result of gene amplification.
Gene duplication (or chromosomal duplication or gene amplification) is any duplication of a region of DNA that contains a gene; it may occur as an error in homologous recombination, a retrotransposition event, or duplication of an entire chromosome.
amplification
The 16s rRNA genes (rDNA) exist on genomic DNA. Therefore, plasmid has nothing to do with its amplification.
However, if the 16s rRNA gene is cloned into the plasmid, it can be amplified.