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Unformatted text preview: or else the cell would be dead. CPS ?: White colony on a Lac Mac + Amp Plate: A. Has MuD1 in a gene that’s turned on. B. Has MuD1 in a gene that is turned off. C. Has MuD1 in a gene that may be on or off. If gene off, can’t make lacZ. When p is on, it gives you red; but when lacZ goes to the left and p,on to the left, would give you white. Therefore, MuD1 could be on or off. When you want to count gametes, what type of cross do you do? Test cross. But we did an F1 x F1 cross! Only look at males and ignore female cross. Recripocal pairs: grouped from homologous pairs put together In the example shown in lecture: The difference between e and g is 49.3. We only saw a crossover distance of 39.7. Why? You can’t see double crossovers. Double crossovers don’t get counted. Reduction of straight probability; coincidence....
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This note was uploaded on 04/27/2008 for the course BIOL 302L taught by Professor Caruso during the Spring '08 term at UMBC.
- Spring '08