2. F+, F- and Hfr cells |
· Many, few or no recombinants |
· Predicting cell type from data |
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3. Interrupted mating |
· Selection for exconjugants |
· Time of entry |
· Map in minutes from origin of transfer |
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4. Natural Gradient of Transfer |
· Auxotrophic marker to select against Hfr parent |
· Selection of two markers per plate |
· Gene order using data |
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5. Multiple Hfrs |
· Circular map |
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Tutorial |
· Phage Life Cycle (animation) |
· Transducing phage |
· Donor |
· Recipient |
· Co-transduction |
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1. Two Factor Crosses |
· Co-transduction with five auxotrophic markers |
· Co-transduction frequencies |
· Gene order |
2. Three Factor Crosses (markers in cis) |
· Genotype frequencies from replica plates |
· Co-transduction frequencies |
3. Simulation of Three Factor Cross
(markers in trans) |
· Choice of donor or recipient strain |
· Choice of selectable media |
· Replica plate data |
· Final map determination |
4. Reciprocal Crosses |
· Two crossovers vs four crossovers |
· Gene order with respect to nearby marker |
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