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Elenna [48]
3 years ago
8

With evolution as the core theme of biology, we can explain traits shared by organisms as evidence of __________ and traits that

differ among organisms as evidence of __________.
Biology
1 answer:
Masja [62]3 years ago
3 0
Decent from a common ancestor; natural selection.
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<em>Cis</em>-regulatory elements (CREs) are non-coding DNA regions that regulate adjacent gene <em>transcription</em>. They usually do it by binding to transcription factors. They are in charge of influencing the rate of which transcription occurs, and less with how much a gene is expressed. On the other hand, trans-regulatory elements are DNA sequences that encode for upstream regulators that can modify or regulate <em>gene expression levels</em>.

Therefore, cis elements are not really in charge of expression levels, mostly transcription rates of single genes, rather. Trans elements are more involved in expression levels.

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