Which mechanism best accounts for the production of distinct cell types from a single genome?
- A
Different cells use different genetic codes.
- Bcheck_circle
Differential transcriptional regulation, including tissue-specific transcription factors and chromatin remodeling.
- C
Random translation of identical mRNAs.
- D
Each cell type contains a different set of genes.
Explanation
All somatic cells generally share the same genome; cell identity arises from differential gene expression driven by tissue-specific transcription factors, chromatin states, and signal-regulated networks.