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bija089 [108]
3 years ago
12

There is a mutation in the operator of the lac operon in a cell such that the lac repressor always stays bound to the operator.

If lactose is added to the cell, what will happen?
Biology
1 answer:
antoniya [11.8K]3 years ago
5 0

Answer:

Yes, if there is a mutation in the operator of the lac operon in a cell such that the lac repressor always stays bound to the operator. If lactose is added to the cell, the lac repressor loses its ability to bind DNA. It clear off the operator, clearing the way for RNA polymerase to transcribe the operon.

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Liono4ka [1.6K]

Dad: TtBb

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You have to use distribution for dihybrid crosses.  Meaning, the first allele of each trait has a equal chance of being paired with the other allele of the other trait.  So for example with Dad, I will number the traits:

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To set up the possibilities from Dad, it would be 13, 14, 23, 24: TB, Tb, tB, tb.  Same idea goes for Mom, except since all alleles are the same, you only need to make one column for Mom, since if you did all 4, the other 3 would just be repeats of the 1.

Cross:

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TB           TtBb

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tb            ttbb

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Explanation:

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Hope this helps :)

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