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To: Heartlander
Yes, you can use mitochondrial DNA as a clock to make trees of descent and to guess at time of divergence. And it's matrilineal.

It isn't what I'm coaxing from tallhappy, a really mind-blowing evolutionary story. He doesn't want to tell it. He's sympathetic to the "I can't handle the TRUTH" crowd.

More on DNA clocks and cytochrome c here and here.

As mentioned above, the cytochrome c proteins in chimps and humans are exactly identical. The clincher is that the two DNA sequences that code for cytochrome c in humans and chimps differ by only one base (a 0.3% difference), even though there are 1049 different sequences that could code for this protein.

The combined effects of DNA coding redundancy and protein sequence redundancy make DNA sequence comparisons doubly redundant; DNA sequences of ubiquitous proteins are completely uncorrelated with phenotype, but they are strongly causally correlated with heredity. This is why DNA sequence phylogenies are considered so robust.


985 posted on 03/20/2002 3:16:31 PM PST by VadeRetro
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To: VadeRetro
It isn't what I'm coaxing from tallhappy, a really mind-blowing evolutionary story. He doesn't want to tell it. He's sympathetic to the "I can't handle the TRUTH" crowd.

Like I said. You project your own limited ideas in to things.

Just because you have recently learned and almost understand some basic ideas in molecular biology, such as smymbiotic theory to explain eukaryotic emergence doesn't mean you have any great knowledge.

You keep trying to go back to pedestrian stuff like mitochondria as remnants of prokaryotic cesll as if it is somehow anything but basic.

To you a "mind blowing" story is in actuality a rather obvious observation.

It's cool sure.

You are such a weird person, very cloistered it would seem.

What's the trippiest thing about it (ie mind blowing)?

997 posted on 03/20/2002 3:50:17 PM PST by tallhappy
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