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Unformatted text preview: a, b, d, e, g, h, k, l all affect one gene. Mutations c, f, i, j affect four distinct genes, all different from the first. (b) 1 → 3 → 2 → 4 → uridine The order of compounds is determined from accumulation phenotypes, not growth phenotypes. (c) In the above sequence, the gene represented by mutation a blocks before compound 1, f between 1 and 3, j between 3 and 2, c between 2 and 4, and i between 4 and uridine. 7. Growth on minimal medium and A B C D E –––––––––––––––––––––– Mutant 1 + + 2 + + 3 + 4 5 + + 8. (a) and (c) (b) Mutant strain At least some accumulation of: 1 D, E, (A, B, C, threonine, if threonine cannot by utilized) 2 A,B,D,E (threonine, if threonine cannot be utilized) 1 3 D,E,F,G 4 no accumulation (provided methionine is utilized) 9. 2...
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