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Old 02-19-2002, 05:14 PM   #1
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Post Evolutionary Cycling

Today in my bio class I heard about the theory of evolutionary cycling. The theory as exists is that essentially as genomes assimilate more and more DNA through different processes, genomes become so cumbersome that previously specialized eukaryotic cells eventually revert back to essentially prokaryotic cells. Of course, my knowledge on this is limited, but I was wondering if someone could shed some light on the topic.

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Old 02-19-2002, 05:32 PM   #2
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I've never heard of it, and it sounds extremely unlikely.
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Old 02-20-2002, 01:37 AM   #3
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New one on me too. Any further details, refs etc Peter?

Cheers, Oolon
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Old 02-20-2002, 10:09 AM   #4
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Arrow

Genomes do not necessarily "get bigger" due to evolution. Not that it appears to make a difference when it does happen. Salamanders have something like 100 times the amount of genetic info as humans with no apparent drawbacks. Many plants have hundreds, in some cases even over a thousand, chromosomes with out any apparent harmfull side affects.
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Old 02-21-2002, 08:52 AM   #5
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Quote:
Originally posted by Peter P.:
<strong>Evolutionary Cycling </strong>

My understanding is it started with boneshakers before evolving to penny-farthings (you probably know these as nickel dimes). Once the chain drive and trapezoidal frame were introduced, further evolution has really been limited to whistles and bells (pardon the pun).

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Old 02-21-2002, 01:36 PM   #6
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Boro, it seems I am Mystic Meg. I somehow knew you'd say something like that.

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