Microbial Recombination and Gene Transfer
The type of recombination that commonly occurs between a pair of homologous DNA sequences is,

site-specific recombination
mutagenic recombination
replicative recombination
general recombination

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Microbial Recombination and Gene Transfer
When composite transposons are formed

a small deletion occurs in the transposase gene of an IS element
a small deletion occurs in the transposase gene of an IS element and plasmid is integrated
two IS elements integrate into a chromosome with only a small distance separating them
an IS element integrates with another IS element with the help of a plasmid

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