(Solved): In an operon similar to the Lac operon in \( E \). coli, you observe the foll ...

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In an operon similar to the Lac operon in \( E \). coli, you observe the following phenotypes from mutations in various genes. Substance "T" acts as an inducer turning the operon on and off. Products 1 and 2 are produced by this operon by genes \( \mathrm{Y} \) and \( \mathrm{Z} \). a) Can you tell if this is a positively or negatively regulated gene? b) Is the mutant \( \mathrm{W}^{-} \)a dominant or recessive mutation? Which strain best gives this information? c) Is W acting in CIS or in TRANS? Which strains give you this information? d) What phenotype would you expect if you build a new strain: \( \mathrm{W}^{-} \mathrm{Y}^{-} \mathrm{Z}^{-} / \mathrm{W}^{+} \mathrm{Y}^{+} \mathrm{Z}^{+} \)