5. Genetics of Bacteria and Viruses
Bacterial Conjugation
3:04 minutes
Problem 18a
Textbook Question
Textbook QuestionAn interrupted mating study is carried out on Hfr strains 1, 2, and 3 identified in Problem 17. After conjugation is established, a small sample of the mixture is collected every minute for 20 minutes to determine the distance between genes on the chromosome. Results for each of the three Hfr strains are shown below. The total duration of conjugation (in minutes) is given for each transferred gene. Hfr strain 1 oriT met ala lac gal Duration (min) 0 2 8 13 17 Hfr strain 2 oriT met leu thr azi Duration (min) 0 2 7 10 17 Hfr strain 3 oriT gal pro trp azi Duration (min) 0 3 8 14 19 Using the chromosome map you prepared in answer to Problem 17, determine the distance in minutes between each gene on the map.
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