Bio help? I just need to know how you got to the answer, so that I can be able t

Question

Bio help? I just need to know how you got to the answer, so that I can be able to do it too...Thank you!

The following shows the genotype of a partial diploid bacterial cell- where one chromosomal region containing the lac operon in E,coli is given, and the other fragment is from a plasmid carrying another lac operon from another source. The two are separated by a slash . The possible answers indicate with a "+' or a whether -galactosidase would be expected to be produced at induced levels under two circumstances: 1) first in the present in the medium.) Genotype A: O+ Z+/ F'I-O+ Z+ KEY: +wild-type repressor !--mutant repressor (unable to bind to the operator) Is mutant repressor (insensitive to lactose) O+ wild-type operator Oc = constitutive operator (insensitive to repr cannot tell for certain

Explanation / Answer

1) In the absence of lactose beta-galactosidase is not produced.

2) In the presence of lactose, as the cell contains both wild type repressor and wild type operator, beta-galactosidase is produced.

So, the answer is -, +

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