The conjugation bridge in an Hfr * F^- mating usually breaks before chromosome transfer is complete; however,because at least part of the plasmid is transferred first,the recipient becomes F⁺.

Question

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In an Hfr (High frequency recombination) cross, the F plasmid is integrated into the bacterial chromosome, and during conjugation, the transfer of genetic material starts with the chromosome, not the plasmid. Thus, the recipient does not become F+ (carrying a complete F plasmid) because the plasmid itself is not transferred first; instead, parts of the donor's chromosome are transferred.

The Conjugation Bridge in an Hfr * F- Mating Usually

The Conjugation Bridge in an Hfr * F^- Mating Usually