We describe the evolution of macromolecules as an information transmission process and apply tools from Shannon information theory to it. This allows us to isolate three independent, competing selective pressures that we term compression, transmission, and neutrality selection. The first two affect genome length: the pressure to conserve resources by compressing the code, and the pressure to acquire additional information that improves the channel, increasing the rate of information transmission into each offspring. Noisy transmission channels (replication with mutations) gives rise to a third pressure that acts on the actual encoding of information; it maximizes the fraction of mutations that are neutral with respect to the phenotype. This neutrality selection has important implications for the evolution of evolvability. We demonstrate each selective pressure in experiments with digital organisms.
To be published in J. theor. Biology 222 (2003) 477-483
Read between January 02 – May 09, 2011
Quotes and Highlights:
You may remember the old Persian saying, ‘There is danger for him who taketh the tiger cub, and danger also for whoso snatches a delusion from a woman.’ There is as much sense in Hafiz as in Horace, and as much knowledge of the world.
Singularity is almost invariably a clue. The more featureless and commonplace a crime is, the more difficult it is to bring it home.
Well, moonshine is a brighter thing than fog, …
…as I said then, that a man should keep his little brain-attic stocked with all the furniture that he is likely to use, and the rest he can put away in the lumber-room of his library, where he can get it if he wants it.
“My God! It’s Watson,” said he. He was in a pitiable state of reaction, with every nerve in a twitter.
41% Note: An interesting early use of @Twitter…
I should be very much obliged if you would slip your revolver into your pocket. An Eley’s No. 2 is an excellent argument with gentlemen who can twist steel pokers into knots. That and a tooth-brush are, I think, all that we need.
87% First reference to Holmes with a magnifying lens in print that I’ve seen.Like
Computer pioneer who helped create the first spreadsheet, Bob Frankston, is this week's guest.
On a recent episode of Leo Laporte and Tom Merrit’s show Triangulation, they interviewed Bob Frankston of VisiCalc fame. They gave a great discussion of the current state of broadband in the U.S. and how it might be much better. They get just a bit technical in places, but it’s a fantastic and very accessible discussion of the topic of communications that every American should be aware of.
How our brains fool us on climate, creationism, and the vaccine-autism link.