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barry barry
wrote...
Posts: 11630
11 years ago
If a cell has the partial diploid genotype    lacI+   lacO-  lacZ+   lacY+
   ______________________
   lacI- lacO-  lacZ+   lacY-     ,

how will its gene expression function in the presence of allolactose?
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wrote...
Educator
11 years ago
In this construct, lacI+ gene is dominant over lacI-, which means repressor protein is produced. Both copies of the operator are defective, however, and the repressor cannot bind to it. The structural genes will therefore be constitutively produced.
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