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Ch. 6 - Genetic Analysis and Mapping in Bacteria and Bacteriophages

Chapter 6, Problem 4

List all major differences between (a) the F⁺ x F⁻ and the Hfr x F⁻ bacterial crosses; and (b) the F⁺, F⁻, Hfr, and F' bacteria.

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Hello everyone here we have a question that says by initiating conjugation, black blank bacteria can transfer the genetic material that is embedded in its chromosome DNA. First up we have F minus and as the name suggests they lack the F. Plasmid and they serve as recipients. So because they like the F plasma they cannot donate genetic material. So A. Is incorrect. Next we have F. Plus. And again as the name suggests, the F plasma can be found in these bacterial cells but the plasma is self replicating. An extra chromosome. Will D. N. A. So B. Is incorrect. Next we have HFR HFR cell is a bacterium with a conjugated plasma like the F. Factor integrated into its chromosome or D. N. A. So C. Is correct. So our answer here is H. F. R. By initiating conjugation, HFR bacteria can transfer the genetic material that is embedded in its chromosome all D. N. A. Thank you for watching. Bye.