Homework04_Key

Homework04_Key - BIS101D/Draper Assignment#4 Due week of...

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BIS101D/Draper Name:_____________________________ Assignment#4 Due week of April 27 8. The Donor and recipient strains of bacteria in a transduction experiment are shown below: Donor: thr + cys + leu - Recipient: thr - cys - leu + The donor allele thr + is used as the selected marker. Following transduction 100 thr + transductants are scored for the other alleles with the following results: Genotype Number of colonies cys + leu + 6 cys + leu - 26 cys - leu + 20 cys - leu - 48 100 a. What is the co-transduction frequency of thr and cys? Show your work. (6+26)/100 = 0.32 b. What is the co-transduction frequency for thr and leu? Show your work. (48+26)/100 = 0.74 c. Which of the unselected markers is closest to thr? Explain your reasoning. leu is closest to thr as evidenced by the higher co-transduction frequency: 74% vs. 32%
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6. (10 pts) a) Circle all of the molecules below that are substrates for the replicative DNA polymerase (Pol III). (4 pts) 3’______________5’
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Homework04_Key - BIS101D/Draper Assignment#4 Due week of...

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