Biology Forums - Study Force

Which of the following best describes expression of the lac genes in this partial diploid?

I+ P+OC Z- Y+/ I- P+ O+ Z+ Y-


▸ Both β-galactosidase and permease are made only when lactose is present.

▸ Both β-galactosidase and permease are made both in the presence of and in the absence of lactose.

▸ Both β-galactosidase and permease are not made whether lactose is present or not.

▸ β-galactosidase is only made when lactose is present, but permease is made both in the presence and absence of lactose.

▸ β-galactosidase is made both in the presence and absence of lactose, but permease is only made when lactose is present.

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