abu afak
ALLAH SNACKBAR!
- Mar 3, 2006
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Another Kweationist Buster string that Lutroo, et al, wouldn't touch with a ten foot poll, even if they had 3-digit IQs. They can't discuss Science strings, only TROLL the section with their own garbage: goofy boobtubes and empty claims.
DNA: optimised source code?
by Matthew Cobb
DNA: optimised source code?
DNA: optimised source code?
by Matthew Cobb
DNA: optimised source code?
[......] This isn’t right. DNA is NOT subject to ‘the most aggressive optimisation process in the universe’. Our genes are NOT perfectly adapted and beautifully designed. They are a Horrible, historical Mess. That is partly what distinguishes biology from physics and maths – it is the outcome of historical processes – evolution and natural selection* – which leave their past traces in the genome.
For reasons we don’t understand, many eukaryotic genes (that is, genes in organisms with a nucleus – so all multicellular organisms and some single-celled forms, too) are sometimes split up, interspersed by apparently meaningless sequences, called ‘introns’. Although the average intron is only 40 bases long, one of the introns in the human dystrophin gene is more than 300,000 bases long! In some rare cases, the intron of one gene can even contain a completely separate, protein-encoding gene.
This isn’t the result of ‘optimisation’: it’s due to the fact that, as François Jacob put it, evolution does not design, it tinkers. It fiddles around with stuff to hand, and as long as it works, that’s all that matters.
We know that only 5% of the human genome encodes proteins (when Francis Crick was working on the meaning of the genetic code in the 1950s, he assumed that’s all that a gene would ever do). We now know that another 5-10% is regulatory DNA, which produces RNA that regulates the activity of other genes. As to the remaining 85% – around 2.7 billion base pairs – it appears mainly to be ‘junk’,
which has No apparent function – if it were deleted, it would Not affect the fitness of the organism at all.
[.......]
abu afak/mbig
`
For reasons we don’t understand, many eukaryotic genes (that is, genes in organisms with a nucleus – so all multicellular organisms and some single-celled forms, too) are sometimes split up, interspersed by apparently meaningless sequences, called ‘introns’. Although the average intron is only 40 bases long, one of the introns in the human dystrophin gene is more than 300,000 bases long! In some rare cases, the intron of one gene can even contain a completely separate, protein-encoding gene.
This isn’t the result of ‘optimisation’: it’s due to the fact that, as François Jacob put it, evolution does not design, it tinkers. It fiddles around with stuff to hand, and as long as it works, that’s all that matters.
We know that only 5% of the human genome encodes proteins (when Francis Crick was working on the meaning of the genetic code in the 1950s, he assumed that’s all that a gene would ever do). We now know that another 5-10% is regulatory DNA, which produces RNA that regulates the activity of other genes. As to the remaining 85% – around 2.7 billion base pairs – it appears mainly to be ‘junk’,
which has No apparent function – if it were deleted, it would Not affect the fitness of the organism at all.
[.......]
abu afak/mbig
`