PS06-Sol - Genetics 320 Problem Set Six Solutions 1. (2...

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A C F B D E 10 10 5 10 10 5 A C F B D E 10 10 5 10 10 5 HFR2 HFR3 Genetics 320 Problem Set Six Solutions 1. (2 points) : You have a bacterial cell that is F - and also lac - . You cross this cell line to two different lac + cells lines. Following a cross to line A, all of the cells are now lac + and can conjugate with F - cells. Following a cross to line B, some small amount of the cells are now lac + but these cannot conjugate with F - . How can you account for these observations? Line one is an F’ with the lac gene on the F, line 2 is an Hfr than transfers lac. 2. (4 points) : Three different HFRs are mapped with respect to five genes (A through F) and the following times of transer are seen: HRF1 HRF2 HRF3 Gene Time Gene Time Gene Time C3 B1 0 E3 3 C2 0 B2 2 E 23 A 25 C 32 D 28 F 35 A 37 F3 8 D 4 5 F4 7 (a) Draw the chromosome map showing the gene orders and distances.
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This note was uploaded on 12/09/2009 for the course ECOL UNIVERSITY taught by Professor Walsh during the Spring '09 term at University of Arizona- Tucson.

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PS06-Sol - Genetics 320 Problem Set Six Solutions 1. (2...

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