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Tim
SFN Regular
USA
775 Posts |
 Posted - 07/11/2005 : 02:14:17
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ICR Impact #385 emphatically states that they've been able to use the human genome publication to successfully refute the notion that humans and chimps evolved from a common ancestor. The great leap of science was, of course, another grand assertion of Haldane's Delemma.
It took those putzes four years to publish this drivel?
I will admit, though, this is another great example of how ICR functions. They have a limited bag of tricks, and keep reaching into it to pull out the same old rabbits that have long since been stuffed, mounted and left in the attic to collect dust. Then, they make up a story that's so convoluted that it hides the fact that they're still shaking the dust off of the musty, old critter.
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"We got an issue in America. Too many good docs are gettin' out of business. Too many OB/GYNs aren't able to practice their -- their love with women all across this country." Dubya in Poplar Bluff, Missouri, 9/6/2004
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Hawks
SFN Regular
Canada
1383 Posts |
 Posted - 07/14/2005 : 19:28:34 [Permalink]
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quote:
Using many long-range human PCR primers (primers used to sequence 10,000 bases at a time) that spanned 32.4 Mb (1Mb = 1 million bases) of human chromosome 21, approximately 27 Mb of chimpanzee chromosome 22 were successfully sequenced.
No DNA was actually sequenced. All they did was amplify the certain DNA fragments and compared the different lenghts (between humans and chimps) of these. From this they examined the number of insertions and deletions that have happened between the two species.
quote:
This left 5.4 Mb of corresponding human sequences undetectable in chimpanzee chromosome 22. Assuming the 5.4 Mb of DNA that was unable to be sequenced in the chimpanzee genome was 70% homologous to the corresponding human sequence (very generous for sequences that are not alignable!) and combining this with the 27 Mb of sequenced chimpanzee DNA (assuming this region is 95% homologous, see above) would give a homology of 90% for human chromosome 21 and chimpanzee chromosome 22. If the unalignable region is less than 70%, the homology of human chromosome 21 and chimpanzee chromosome 22 will be even less than 90%.
I'm not sure on what they base they base their assumption that the 5.4 MB of DNA is 70% different. No DNA in this study was sequenced. The point of the study was to estimate the number of insertions and deletions in the two species' genomes (for these chromosomes). Those 5.4 MB of DNA might be 100% similar, but only constitute one genome rearrangement. The paper says nothing about this.
A more recent paper "DNA sequence and comparative analysis of chimpanzee chromosome 22 (Watanabe et al, Nature 27th May 2004), found (based on full sequence analysis) that the differences between the chromosomes consist of 68,000 insertions or deletions and 1.44% single-base substitutions. ICR assumptions appear to be nothing more than wild guesses. |
METHINKS IT IS LIKE A WEASEL
It's a small, off-duty czechoslovakian traffic warden! |
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