Genetics Question Explanations please. A) ABCDE B) EDCBA C) AEBCD D) BCEDAC E) A

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Genetics Question

Explanations please.

A) ABCDE B) EDCBA C) AEBCD D) BCEDAC E) AEDCB 15. We've got an Hfr strain with the plasmid inserted near the trp (tryptophan) locus. We run a cross of this Hff strain with a F trp strain. We isolate a trp strain that can readily donate this trait to other trp str in. We isolate a trp strain that can readily donate this trait to other trp' strains. No No other traits are transferred. What has happened? A) generated a Ftrp plasmid B) typical Hfr mating C) transduction occurs D) transformation occurs E) cannot determine from this information 0 Through the use of different Hfr strains (H, 1, 2, and 3) that have the F factor inserted into the chromosome at different points and in different directions, interrupted-mating experiments can provide the order of genes in the E. coli genome. The linear order of transfer of markers is shown below for four Hfr strains. Using this data, construct a physical map of the E. coli chromosome. HfrH thi gly his gal pur lac Hfrl pro lac pur gal his gly Hfr2 lac pur gal his gly thi Hfi3 gal his gy thi thr pro 16. i can his hislmosers

Explanation / Answer

15) It is a typical Hfr mating.In Hfr mating the strain will transfer the entire chromosome into the receiving cell.due to very large size of the chromosome, the entire chromosome cannot be transferedas the physical contact cannot be maintained too long.S the conjugative transfer never be complete.

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