AP Biology / Unit 6: Gene Expression and Regulation
6.6 Gene Expression and Cell Specialization
Notes
All body cells have the same DNA, but different genes are expressed. Specific transcription factors turn on cell-type genes, leading to differentiation.
- Small RNAs (like miRNA) can block translation.
Practice
Nerve and muscle cells differ because they:
Same genome, different expression.
miRNAs regulate genes by:
Post-transcriptional control.
Which controls which genes a cell type expresses?
Regulatory proteins.
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