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  #1  
Unread September 20th, 2006, 10:46 AM
ToddStark ToddStark is offline
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Post Genetics News: Mechanism To Organize Nervous System Conserved In Evolution

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A study led by University of California, San Diego biologists suggests that, contrary to the prevailing view, the process in early development that partitions the nervous system in fruit flies and vertebrates, like humans, evolved from a common ancestor.

The findings suggest a unified model of early neural development in which at least part of the mechanism for creating neural patterning has been preserved from a shared ancestral organism that lived over 500 million years ago.
[TIS - middle of article omitted]


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“Our findings suggest that BMPs may once have been sufficient to organize the entire dorsal-ventral axis of a common ancestor,” concluded Bier.

“BMPs and the neural identity genes appear to have been conserved in evolution, while other cues such as Dorsal in flies and Hedgehog in vertebrates may have been borrowed from other pattern systems after the split between vertebrate and invertebrate lineages. As larger organisms evolved, the gradient of a single protein may not have been able to provide sufficient information to subdivide the embryo from top to bottom.”
Source: Science Daily
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  #2  
Unread September 22nd, 2006, 03:58 PM
James Brody James Brody is offline
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Default Re: Genetics News: Mechanism To Organize Nervous System Conserved In Evolution

Todd,

Very cool!
Thanks for this.

Jim
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  #3  
Unread September 23rd, 2006, 02:11 PM
Fred H. Fred H. is offline
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Default Re: Genetics News: Mechanism To Organize Nervous System Conserved In Evolution

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. . . contrary to the prevailing view, the process in early development that partitions the nervous system in fruit flies and vertebrates, like humans, evolved from a common ancestor.
From “a common ancestor” somehow rings true to me . . . although I tend to see ancestor as being somewhat equivalent to terms like predecessor, forerunner, precursor, antecedent, prototype, etc.; and also somehow interrelated with and dependent on the fact that the universe had a beginning, about 14 billion years ago, with inexplicably low entropy and the necessary physics to facilitate life, evolution, consciousness, and our being here.
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