What Is the Most Expected Effect of a Deletion Mutation

question 20

Multiple Choice

What is the most expected effect of a deletion mutation covering the promoter sequence of the lactose operon?

• A) Loss of catabolite repression of beta-galactosidase.
• B) Loss of transcription of the beta-galactosidase gene in the presence of lactose.
• C) Transcription of the beta-galactosidase gene in the absence of lactose.
• D) Transcription of the beta-galactosidase gene only in the presence of high levels of lactose.
• E) Constitutive synthesis of beta-galactosidase in an F' merodiploid.

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A partnership characterized by mutual respect, where all parties have equal say and value in the relationship.

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