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ordinaryguy Posts: 1,795, Reputation: 3046
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#3

Jan 9, 2008, 02:16 PM
Yes, tell me more.

I read something not long ago where biologists were asked what they thought the most exciting and significant advances were in genetics in the last five years. I may not get it quite right, since I'm working from memory, but what I took away was the idea that it used to be thought that a particular gene was just a pattern for making a particular protein, or at most a set of a very few very similar proteins. But what's new is the realization that a sizeable minority--20-some percent maybe?--of the DNA strand actually functions to regulate the sequence and timing of the (more numerous) protein-making genes, and that's where the real action is.

For example, the difference between a wing and a front leg isn't a whole bunch of different genes, it's just a relatively few, relatively straightforward differences in the way the same genes are activated and regulated during embryonic development. This would seem to make adaptation and evolution a much "easier" process than previously thought.

Am I close at all?
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