You've crossed two strains: (Hfr) pro+ lac+ arg+ with (F-) pro- lac- arg- . Interrupted mating studies indicated that arg+ enters the cell last, so you want to select for arg+ recombinants in order to map the genes by recombination. Which type of plates will you use for your initial selection? Containing proline, lactose, and arginine. Containing proline, glucose, and arginine. Containing arginine and glucose. Containing lactose and proline. Containing glucose and proline. Minimal media with nothing added.

The genomes of two E. coli strains are compared in Figure14-19. Would you expect any third strain to contain moreof the blue, tan, or red regions shown in Figure 14-19?Explain.

An Hfr strain that is leuA+ and thiL+ was mixed with a strain thatis leuA− and thiL−. In the data points shown in the following graph,the conjugation was interrupted at different time points, and thepercentage of recombinants for each gene was determined bystreaking on a medium that lacked either leucine or thiamine.What information do you know based on the question and your understanding of the topic?

The pathway for arginine biosynthesis in Neurosporacrassa involves several enzymes that produce a seriesof intermediates.ARG-E ARG-F ARG-G ARG-HN-acetylornithine → ornithine → citrulline → argininosuccinate → argininea. If you did a cross between ARG-E− and ARG-H−Neurospora strains, what would be the distributionof Arg+ and Arg− spores within parental ditype andnonparental ditype asci? Give the spore types inthe order in which they would appear in the ascus.b. For each of the spores in your answer to part (a),what nutrients could you supply in the media to getspore growth?

SOD1 vs RM95 – 20% recombinant TGLA57 vs UMPS – 21% recombinant UMPS vs CRYG8- 17% Recombinant RM95 vs UMPS 50% - recombinant TGLA vs CRYG8 – 38% recombinant SOD1 vs TGLA57 – 49% recombinant RM95 vs TGLA 57 – 29% recombinant SOD1 vs UMPS – 50% recombinant what is the order of the genes on the chromosome and what is there distance in cM

A pair of paralogous repeats, A and B, have 96% sequence similarity and therefore can promote non-allelic homologous recombination (NAHR). They exist in four possible arrangements in a genome, illustrated below as arrangements 1 – 4. What is the result of NAHR between repeats A and B in arrangement 1? A.Translocation between chromosomes 1 and 2 resulting in monocentric chromosomes B.Deletion or duplication of the region between A and B C.Translocation between chromosomes 1 and 2 resulting in acentric and dicentric chromosomes D.Inversion of the region between A and B

An Hfr strain that is leuA+ and thiL+ was mixed with a strain thatis leuA− and thiL−. In the data points shown in the following graph,the conjugation was interrupted at different time points, and thepercentage of recombinants for each gene was determined bystreaking on a medium that lacked either leucine or thiamine.Make a calculation.