Development of multicellular organism

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The discussion explores the development of multicellular organisms, particularly focusing on the nematode C. elegans and the fruit fly Drosophila. Key points include the role of asymmetric cell division in determining cell fate and the significance of the HOX gene complex in body patterning. The conversation also touches on the function of introns and exons in gene expression and their potential involvement in pleiotropic effects, emphasizing that introns may not be as non-functional as previously thought. Additionally, there is speculation about the evolutionary transition from single-celled to multicellular life, suggesting that the ability to form multifunctional cells was crucial for the emergence of complex organisms. Overall, the dialogue highlights the intricate processes underlying cellular differentiation and development.
  • #31
btw, that exerpt came from Alberts et al, Molecular biology of the cell.
 
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  • #32
Originally poste by Monique (Phonetic engineer?)
(SNIP) Also very interesting, there are ALWAYS 131 cells that commit suicide of the 1030 somatic cells in the worm. (SNoP)
That is kinda interesting.
In my viewing of television I had also seen someone playout the sequence of someones DNA on a piano..."phonetics engineering" anyone? (It's sort of just a thought...)
 
  • #33
Well, isn't that interesting? I am not sure where that comment came from, but anyway: I'd wonder how long it would take to play the sequence of ACGTs and where the T lies on the piano, how the person dealt with methylated bases, mis-matched bases, dimerized thymines, depurinations, missing nucleotides and the boring long stretches of GC islands.
 
  • #34
Originally posted by Monique
Well, isn't that interesting? I am not sure where that comment came from, but anyway: I'd wonder how long it would take to play the sequence of ACGTs and where the T lies on the piano, how the person dealt with methylated bases, mis-matched bases, dimerized thymines, depurinations, missing nucleotides and the boring long stretches of GC islands.
"Selective quotation"...I would suppose...
 
  • #35
Originally posted by Monique

Also very interesting, there are ALWAYS 131 cells that commit suicide of the 1030 somatic cells in the worm.

not always just 131, but always THE SAME 131!
 
  • #36
Originally posted by cryo
not always just 131, but always THE SAME 131!
Cheese, you make it sound difficult to understand, needed the 131 to construct itself, and didn't need them thereafter, soooo in a VERY energy efficient manner, it eliminated that which it no longer had use for. After all, why keep cells, that are no longer of any use, FED!
 
  • #37
But if I understand the processes of evolution, an organism can't "eliminate" cells just because there is no more use for them. There has to be an adaptive gradient for them to go. Some reason that organisms without them leave more viable descendents than those with them.
 
  • #38
Originally posted by selfAdjoint
But if I understand the processes of evolution, an organism can't "eliminate" cells just because there is no more use for them. Why Not?[/color] There has to be an adaptive gradient for them to go. Yes, less energy! not having to feed them[/color] Some reason that organisms without them leave more viable descendents than those with them. Construction (team) of a self replicating organism as to be able to leave the viable descendents[/color]
Simply a structural mechanism, like having carpenters build you a house, then they leave, in this case, the cells, they die.

Think about it, life was given, cells died, just so you could be formed, and live.
 

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