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Problems with Chromosomal Evolution - From Circular to Linear

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Author Topic:   Problems with Chromosomal Evolution - From Circular to Linear
Peter
Member (Idle past 1509 days)
Posts: 2161
From: Cambridgeshire, UK.
Joined: 02-05-2002

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Message 12 of 58 (136268)
08-23-2004 9:02 AM 		Reply to: Message 1 by jt
08-20-2004 4:04 PM

Maybe both types of cell evolved from a common ancestral
strain that no longer exists.
​
The step then would not be from one to another, but from
unkown X to Eu & Pro caryotes.
​
Just a thought, I mean, it was a couple billion years ago
wasn't it?
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 Message 13 by Wounded King, posted 08-23-2004 11:26 AM Peter has replied
  
Peter
Member (Idle past 1509 days)
Posts: 2161
From: Cambridgeshire, UK.
Joined: 02-05-2002

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Message 48 of 58 (138371)
08-31-2004 7:56 AM 		Reply to: Message 13 by Wounded King
08-23-2004 11:26 AM

If there was some "organism" several steps back from
both, that branched over a number of change cycles
to result in both types of cell then the link between
the types would be further removed and less of a conundrum.
​
What makes prokaryotic cells more primitive, BTW?
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Peter
Member (Idle past 1509 days)
Posts: 2161
From: Cambridgeshire, UK.
Joined: 02-05-2002

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Message 50 of 58 (138723)
09-01-2004 5:51 AM 		Reply to: Message 49 by Wounded King
08-31-2004 9:15 AM

ther isn't much room for some in between sort of common ancestor.
​
I wasn't thinking of 'in-between' when I was thinking of common
ancestor, rather more like enabling the development of either --
which really isn't the same -- honest
​
Why do you think your scenario is any less of a 'conundrum'
​
I was thinking more scope for changes to become manifest in
smaller steps ... in reference to this DNA structure comment
someone raised.
​
the prokaryotes precede the eukaryotes by a couple of billion years
​
So by 'more primitive' you just meant older?
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Peter
Member (Idle past 1509 days)
Posts: 2161
From: Cambridgeshire, UK.
Joined: 02-05-2002

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Message 52 of 58 (138738)
09-01-2004 9:16 AM 		Reply to: Message 51 by Wounded King
09-01-2004 8:19 AM

That works for me
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