31. Crosses of three different Hfr strains with an F strain are carried out, and

Question

31. Crosses of three different Hfr strains with an F strain are carried out, and the following mapping data are provided from studies of interrupted conjugation. Assume that it takes exactly 60 minutes to transfer an entire chromosome (i.e., the total map length is 60 minutes). Based on these data, what is the best interpretation of the gene order and map distances in the bacterial chromosome? Appearance of genes inF~ cells Hfr1: Genes b d cf Hfr2: Genes Hfr3 Genes df Time3 16 27 59 24 35 4648 15 26 4458 Time 6 Time 4 a. d is between b and c and is 5 minutes from b b. g is between b and e and is 4 minutes from b c. e is between fand g and is 24 minutes from f d. b is between d and c and is 1 minutes from d e. none of these is correct

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31. Crosses of three different Hfr strains with an F strain are carried out, and

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