What is the difference between an Hfr strain and an F-prime strain of Escherichia coli?

Question

Quizplus · Accepted Answer

The Hfr strain is a strain of E. coli with an F factor integrated into its chromosome. As a result, during conjugation, the Hfr strain is able to transfer portions of its chromosome to the recipient cell, which is usually an F- strain. Conversely, the F-prime strain is a strain of E. coli with an F factor that has been incorrectly excised from the chromosome, leaving some of the chromosome behind, resulting in a F' plasmid. This F' plasmid contains some chromosomal genes and an F factor, and can transfer these genes to another bacterial cell.

Therefore, Option D is correct because the Hfr strain is able to transfer more E. coli genes to the recipient than the F-prime strain.

What Is the Difference Between an Hfr Strain and an F-Prime