genetic expression
Learn about this topic in these articles:
major reference
- In cell: Genetic expression through RNA
The process of genetic expression takes place over several stages, and at each stage is the potential for further differentiation of cell types.
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cell differentiation
- In cell differentiation: Factors influencing differentiation
…of transcription factors that dictate gene expression. Changes in the expression of specific genes ultimately determine cell specialization. Epigenetic changes, which are modifications to DNA (e.g., methylation), further influence gene expression. Physical conditions, such as osmotic pressure, may also be influential.
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epigenetics
- In epigenetics: Types of epigenetic modifications
…certain histone modifications distinguish actively expressed regions of the genome from regions that are not highly expressed. These modifications may correlate with chromosome banding patterns generated by staining procedures common in karyotype analyses. Similarly, specific histone modifications may distinguish actively expressed genes from genes that are poised for expression or…
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regulation
- In heredity: Regulation of gene expression
Not all genes in a cell are active in protein production at any given time. Gene action can be switched on or off in response to the cell’s stage of development and external environment. In multicellular organisms, different kinds of cells express different…
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