The most common way for genes to be regulated is

The most common way to regulate gene expression is at the transcription. Mostly in eukaryotes; genes and promoters are randomly located on genome with no real organization. A gene that codes for a protein, such as a repressor, that controls the transcription of another gene or group of genes.

Explanation:

it would affect precipitation by causing flooding in some areas of the world due to climate increasing, causing the glaciers in the northern and southern pole of our planet to melt.

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