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Gene Expression - Coggle Diagram
Gene Expression
Transcription Factors
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Some genes require specific transcription factors that bind to control elements close to or farther away from the promoter
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A repressor is a transcription factor that binds to a control element and inhibits transcription of a gene
control elements- segments of noncoding DNA that serve as binding sites for transcription factors that help regulate transcription
- Enhancers- Distal control elements that are far away from a gene or even located in an intron
- Proximal control elements are located close to the promoter
RNAi
MicroRNAs (miRNAs) are small, RNA molecules that can bind to complementary mRNA sequences and can degrade the mRNA or block its translation
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coordinate control
Eukaryotic genes that are co-expressed are scattered over different chromosomes, but each has the same combination of control elements. Copies of the activators recognize specific control elements and promote simultaneous transcription of the genes
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Epigenetic Inheritance
The inheritance of traits transmitted by mechanisms not directly involving the nucleotide sequence. Epigenetic modifications can be reversed, unlike mutations in DNA sequence
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