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: 2012/1/9 11:30
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I många år har forskarna varit förbryllade över att ca: 97% av vårt DNA inte tycks fylla någon funktion. Vissa av dem som forskat på historia och konspirationer, t.ex Michael Tsarion, hävdar att det s.k "Junk" DNA:t inte alls är skräp, utan ett av bevisen för att vi blivit genetiskt manipulerade för länge sedan av en utomjordisk ras.
Jag kollade runt på internet för att hitta uppgifter om det s.k skräp-DNA:t och hittade bl.a följande: UTDRAG UR NORDBIKONFERENS ANG DNA.
Endast 3 procent av människans DNA är kodande. 97 % är s k junk-DNA eller skräp-DNA. Vad man vet utan funktion. Kallas intergenetiskt DNA = utfyllnads-DNA. Det innehåller repeterande sekvenser, t ex CACACACA etc. Längden av dessa repeterande sekvenser är unik mellan individer och kan användas i t ex brottsutredningar. Det kallas också satelit-DNA.
Skräp DNA enligt WIKIPEDIA ENCYKLOPEDIN
Skräp-DNA (eng. "junk-DNA") är delar av DNA-molekylen som inte kodar för gener och vars funktion är okänd. När DNA har blivit transkripterat till M-RNA i cellkärnan så bortfaller vissa bitar (Intronerna, som också kallas skräp RNA). Vad intronerna har för betydelse är inte säkert fastställt ännu.
Evolutionsbiologi – Utdrag från genetiknämnden
Mellan generna på kromosomerna finns s.k. skräp-DNA, vilket hos människan utgör ca 90 % av cellens DNA. Skräp-DNA har tidigare ansetts sakna genetisk information. På senare tid har dock forskningsresultat kommit fram som tyder på att det kan finnas viktiga genetiska styrelement där. Det kan även innehålla s.k. hoppande DNA-sekvenser som genom att hoppa in i gener kan medverka till evolutionära förändringar av gener.
Utdrag ur Frågor och Notiser om DNA
Inget "skräp" i arvsmassan. Molekylärbiologerna har inte kunnat komma underfund med vad 97% av arvsmassan har för uppgift. Man har kallat detta för "Junk-DNA", dvs skräp-DNA. Man trodde att DNA-koderna var slumpvist uppradade i detta "skräp". Men 1994 kom en vetenskaplig rapport som visade att dessa 97 % inte alls var slumpvis fördelade utan hade en uppbyggnad som var slående likt det mänskliga språket. Man drog slutsatsen att en sådan systematisk ordning i koderna talar för att "Junk-DNA" innehåller kodmeddelanden till cellen. Ännu har man inte lyckats knäcka koden och vet mycket lite om dess funktion.
Alien message 'may be in our DNA'
Forget waiting for ET to call -- the most likely place to find an alien message is in our DNA, according to an expert in Australia.
Professor Paul Davies, from the Australian Centre for Astrobiology at -DPAto home." – Sapa
Macquarie University in Sydney, believes a cosmic greeting card could have been left in every human cell.The coded message would only be discovered once the human race had the technology to read and understand it.Writing in New Scientist magazine, Davies said the idea should be considered seriously.For more than 40 years astronomers have been sweeping the skies with radio telescopes hoping to catch a signal from an alien civilisation.So far the search has been in vain. But Davies believes it is wrong to assume that extraterrestrials who may be hundreds of millions of years ahead of us technologically will have chosen to communicate by radio.Leaving artefacts for humans to find once they are sufficiently evolved -- like the obelisk in the movie 2001: A Space Odyssey -- might be a more attractive strategy, he said.But ensuring the survival of such an artefact over possibly millions of years would be difficult.
A better solution would be to incorporate information into the human genome, allowing it to be copied and maintained over immense periods of time.
One way to do this might be to deliver alien viruses which could infect cells with message-laden DNA, said Davies.
Scientists have recently discovered large sequences of "junk" DNA that contain no genes and appears to be very stable.
"If ET has put a message into terrestrial organisms, this is surely where to look," said Davies.
A computer could be used to find obvious attention-grabbing patterns within these stretches of DNA, he said. If a sequence of junk units of DNA were displayed as an array of pixels on a screen and produced a simple image "the presumption of tampering would be inescapable".
The DNA code was easily big enough to contain a decent-sized novel or a potted history of the rise and fall of an alien civilisation.
Davies added: "Trying to second-guess alien communication strategies is fraught with uncertainty, so we should try everything we can afford. The truth may be out there somewhere. Or it could be a lot closer.
Utdrag ur MAIL & GUARDIAN
Designed by aliens? by Gary Bates Utdrag ur Answers in Genesis ang. 2 nobelpristagares teorier om DNA.
Francis Crick and James Watson have used the occasion of the 50th anniversary of their discovery of the DNA double helix as an excuse to attack belief in a Creator.1
A recent UK news article about the Nobel-Prize–winning pair claimed ‘scientific discoveries have a habit of offending religious susceptibilities’, and pointed out, ‘Watson and Crick are both outspoken atheists.’1
These comments attempt to reinforce the old canard that science somehow disproves Christianity. However, as creationists have long pointed out, it is not the scientific facts that are the problem; it’s the interpretation of those facts. This was made abundantly clear by Crick’s beliefs. Long before he ever discovered DNA’s structure, he held strong atheistic views. The news article1 even reported that Crick’s distaste for ‘religion’ was one of the prime motives that led to his discovery, and also said, ‘The antipathy to religion of the DNA pioneers is long standing. In 1961 Crick resigned as a fellow of Churchill College, Cambridge, when it proposed to build a chapel.’
DNA: really evidence for design But what was it that Watson and Crick discovered that supposedly disproved the idea of an intelligent Creator God? The DNA molecule has often been described as the most efficient information storage system in the entire universe. The immensity of complex, coded and precisely sequenced information written on the DNA is absolutely staggering. The evidence speaks of intelligent, information-bearing design. Complex DNA coding would have been necessary for even the hypothetical first ‘so-called’ simple cell(s). Indeed, Creation magazine also used the 50th anniversary of the double helix’s discovery to publish a detailed article on the wonders of DNA.2
Even Crick himself was quoted as saying, ‘An honest man, armed with all the knowledge available to us now, could only state that in some sense, the origin of life appears at the moment to be almost a miracle, so many are the conditions which would have had to have been satisfied to get it going.’3
Crick reasoned that life could not have evolved from non-living chemicals under any conceivable earth conditions. But the idea of a creator was unacceptable, since it would go against his atheistic faith. He affirmed this when he said, ‘People like myself get along perfectly well with no religious views.
Posted on: 2006/4/26 17:22
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