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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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Mr. MD76 Mr. MD76
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9 years ago
If a cell has the partial diploid genotype    lacI+    lacO+   lacZ-   lacY+
   _______________________
   lacI- l acO+   lacZ+    lacY-    ,

how will its genes be expressed in the presence of lactose?
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#1
9 years ago
As you can see,the lacI+ gene is dominant over lacI-, and the operator is functional. Similarly, the wild-type (+) versions of the lacZ and lacY genes are dominant. So, this construct should function normally in the presence of allolactose.
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