Explain why it is made and why only for a short time

Reference no: EM13139999

A lacI+ lacO+ lacZ+ lacY+ Hfr strain is mated with an F- lacI- lacO+ lacZ- lacY- strain. In the absence of any inducer in the medium, beta-galactosidase is made for a short time after the lac region has been transferred. Explain why it is made and why only for a short time.

Reference no: EM13139999

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