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Unformatted text preview: specified by a codon if you knew only the first two nucleotides? b. In how many cases would you fail to know the first two nucleotides of the codon if you knew which amino acid is specified by it? 4. Explain why mutations in the lac I gene are trans in their effects, but mutations in the lac O gene are cis in their effects. 5. For the genotypes given, fill in the table indicating if, in the presence or absence of lactose, each diploid will produce normal -gal and Permease (assume no glucose present). -galactosidase Permease Genotype No Lactose Lactose No Lactose Lactose I + P + O + Z + Y + /I + P + O + Z + Y + I-P + O c Z + Y-/I-P + O + Z-Y + I-s P + O + Z + Y + /I-P + O + Z + Y + I + P + O + Z-Y + /I-P + O + Z + Y-6. . What happens to cAMP/CAP when: a. High glucose is present: b. Low glucose is present:...
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