Answer :
Answer:
Hfr strain
Explanation:
Bacteria conjugation is the bacterial equivalence of sexual reproduction or mating, due to the high prevalence of recombinants produced by this copulation, it is referred to as Hfr conjugation and the donor is called an Hfr strain.
Hfr strains comprises the F factor which is integrated in their chromosomes rather than free in the cytoplasm. When it is incorporated, the F plasmid's tra operon is still functional, the plasmid can direct the synthesis of pili, carrying out the rolling circle replication and the transfer of genetic material to an F- recipient cell.
When an Hfr strain participated in conjugation, bacterial genes are moved to the recipient in either a clockwise or a counter clockwise direction around a circular chromosome, depending on the orientation of the integrated F factor.
Final answer:
A bacterial strain that transfers bacterial chromosomal genes during conjugation is called an Hfr cell. This mechanism is important for the spread of antibiotic resistance in bacterial communities.
Explanation:
A bacterial strain that transfers bacterial chromosomal genes during conjugation is called an Hfr cell. During conjugation, the F-plasmid occasionally integrates into the bacterial chromosome, forming an Hfr cell.
The Hfr cell can then transfer chromosomal DNA to a recipient cell through conjugation. This mechanism is important for the spread of antibiotic resistance in bacterial communities.
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