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You are interested in mapping the genetic distance between two phage genes. You know from your...

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Biology

You are interested in mapping the genetic distance between twophage genes. You know from your genetics course that relative genedistance in both bacteria and eukaryotes can be determined byfinding the recombination frequency of the two genes.

You infect a bacterial cell with two phages (h+r+ andhr) and you plate the progeny phages onto a bacterial lawncontaining both strains of bacteria susceptible to the hmutant phenotype.  

a) Describe all the possible plaque phenotypes you would see andthe genotypes associated with each.

b) Which two phenotypes are the most abundant?

c) If the two most abundant plaque phenotypes togethertotal 140 out of 200 plaques, what is the genetic distance betweenthese two genes in map units?

d) What would happen if the double mutant phage (hr)had failed to coinfect the bacterial cell? Would your plate lookthe same? Why or why not?

Answer & Explanation Solved by verified expert
4.0 Ratings (521 Votes)
A possible plaque phenotypes will be a double wildtype the double mutant one wildtype one mutant one mutant one wildtype hr hr hr and hr the possible plaque genotype will be hr hr hr and hr    See Answer
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