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Alexxandr [17]
3 years ago
12

Why is crossing over of the chromosomes during meiosis important?

Biology
2 answers:
sertanlavr [38]3 years ago
8 0
It’s important because you have to stop by Burger King every 5 min hope this helped you out
iren [92.7K]3 years ago
7 0

Because it increases the genetic variability, offering more combinations of genotypes.

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In negative control of transcription by the lac operon, how does the presence of an inducer affect transcription?.
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If the inducer [allolactose] is present in the negative control then it will bind to the repressor decreasing its ability to bind to the operator due to which the transcription begins again and the operon is turned on.

Lac Operon is a set of three genes z, y & a which are regulated under the same promoter which regulates the amount of lactose production in the cell.

An inducer is a molecule that has the ability to induce or activate the operon. ex- in the case of the lac operon, allolactose acts as an inducer.

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But if the inducer will be present even in the negative control then the transcription takes place and the operon will be on.

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