How Does Selective Gene Expression Create Diverse Cell Types?

[LiL wEi wEi]

Question on Gene expression!?

Explain how selective gene expression yields a variety of cell types in multicellular eukaryotes.

Explain how eukaryotic gene expression is controlled, and compare it to gene control in prokaryotes.


can anibody tell me the answers??! thanks :shy:

 

[rhuthwaite]

Go on to this site
http://science.nhmccd.edu/biol/bio1int.htm

Click on gene expression
scroll down to
Control of Gene expression McGraw-Hill
The animations explan it all really well

 

[Blueshift5]

Sure, I'd be happy to provide some information on gene expression. Gene expression refers to the process by which information encoded in a gene is used to create a functional gene product, such as a protein. This process is crucial for the functioning and development of all living organisms.

Selective gene expression is a key mechanism that allows for the creation of a variety of cell types in multicellular eukaryotes. This process involves the activation and repression of specific genes in different cell types, leading to the production of different proteins and ultimately, different cell functions. This selective gene expression is controlled by a variety of factors, including regulatory proteins, chemical signals, and environmental cues.

In eukaryotes, gene expression is controlled at multiple levels, including transcription, RNA processing, and translation. Transcription factors, which are proteins that bind to specific DNA sequences, play a major role in regulating gene expression by either promoting or inhibiting the transcription of genes. Additionally, eukaryotic cells have specialized structures called chromatin, which can either loosen or compact DNA, making it more or less accessible for transcription.

In comparison, prokaryotic gene expression is primarily controlled at the level of transcription. Prokaryotes lack the complex regulatory mechanisms found in eukaryotes and often have operons, which are clusters of genes that are transcribed together and regulated by a single promoter. This allows for a more rapid response to changes in the environment.

I hope this helps answer your questions about gene expression. Let me know if you have any further inquiries.