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Recombination in bacteria

A particular Hfr strain normally transmits the pro+ marker as the last one during conjugation. In a cross of this strain with an F- strain, some pro+ recombinants are recovered early in the mating process. When these pro+ cells are mixed with F- cells, the majority of the latter are converted to pro+ cells that also carry the F factor. This job furthger explains these results.

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Recombination in bacteria is featured.