Understanding through Discussion


Welcome! You are not logged in. [ Login ]
EvC Forum active members: 79 (8897 total)
Current session began: 
Page Loaded: 03-20-2019 5:47 AM
126 online now:
Phat (AdminPhat), Tangle (2 members, 124 visitors)
Chatting now:  Chat room empty
Newest Member: WookieeB
Post Volume:
Total: 848,478 Year: 3,515/19,786 Month: 510/1,087 Week: 100/212 Day: 16/14 Hour: 0/0


Thread  Details

Email This Thread
Newer Topic | Older Topic
  
Prev123
4
Author Topic:   Oh Good - Bart is back
derwood
Member
Posts: 1457
Joined: 12-27-2001


Message 46 of 51 (33530)
03-03-2003 9:12 AM


MPG advocates not good at detecting patterns
Fortunately, there are many phylogeny programs that are.
Even more fortunately, there are systematists that can present data for which computer analysis need not be required. My linked to alignment, for example.

I guess a 40 million year split wasn't quite good enough...


Replies to this message:
 Message 48 by Admin, posted 03-03-2003 10:08 AM derwood has responded

    
derwood
Member
Posts: 1457
Joined: 12-27-2001


Message 47 of 51 (33531)
03-03-2003 9:15 AM


And another thing...
I suggest that Borger take a gander at the links Dr.Caporale presented in regards to the topic of 'non-random mutation' affecting phylogenetic analyses.

As has been so often been shown to be the case, the issue is not quite what Borger insisted it is.


Replies to this message:
 Message 49 by Admin, posted 03-03-2003 10:15 AM derwood has responded

    
Admin
Director
Posts: 12578
From: EvC Forum
Joined: 06-14-2002
Member Rating: 3.6


Message 48 of 51 (33533)
03-03-2003 10:08 AM
Reply to: Message 46 by derwood
03-03-2003 9:12 AM


Re: MPG advocates not good at detecting patterns
Hi Scott,

I'm trying to make sure this thread can be followed by others. The link you're referring to is this one:

http://www2.norwich.edu/spage/alignmentgam.htm

There's no key for how to interpret it.

------------------
--EvC Forum Administrator


This message is a reply to:
 Message 46 by derwood, posted 03-03-2003 9:12 AM derwood has responded

Replies to this message:
 Message 50 by derwood, posted 03-04-2003 9:12 AM Admin has not yet responded

    
Admin
Director
Posts: 12578
From: EvC Forum
Joined: 06-14-2002
Member Rating: 3.6


Message 49 of 51 (33535)
03-03-2003 10:15 AM
Reply to: Message 47 by derwood
03-03-2003 9:15 AM


Re: And another thing...
SLPx writes:

I suggest that Borger take a gander at the links Dr.Caporale presented in regards to the topic of 'non-random mutation' affecting phylogenetic analyses.

I'm guessing that the links you're referring to are those that appeared in Message 24 of the Darwin in the Genome thread. Here they are again:

Could you summarize how these abstracts bear on the discussion?

------------------
--EvC Forum Administrator


This message is a reply to:
 Message 47 by derwood, posted 03-03-2003 9:15 AM derwood has responded

Replies to this message:
 Message 51 by derwood, posted 03-04-2003 9:15 AM Admin has not yet responded

    
derwood
Member
Posts: 1457
Joined: 12-27-2001


Message 50 of 51 (33613)
03-04-2003 9:12 AM
Reply to: Message 48 by Admin
03-03-2003 10:08 AM


Re: MPG advocates not good at detecting patterns
One can go here:

http://www2.norwich.edu/spage/alignment1.htm

for a quick primer.

Basically, the 'letters' you can see represent the nucleotides in the sequence that differ from the top sequence (reference sequence).
At 21 sites in, you can see a number of species have an 'A', for example. All of them happen to be Old World monkeys.
Such patterns can be found throughout the alignment.


This message is a reply to:
 Message 48 by Admin, posted 03-03-2003 10:08 AM Admin has not yet responded

    
derwood
Member
Posts: 1457
Joined: 12-27-2001


Message 51 of 51 (33614)
03-04-2003 9:15 AM
Reply to: Message 49 by Admin
03-03-2003 10:15 AM


Re: And another thing...
The abstracts linked to by Dr.Caporale deal with the potential difficutlis in phylogenetic analyses due to non-random mutations and other occurrances that can obscure 'true' phylogentic reconstruction. The abstracts, however, iindicate that while there are potential problems, sufficiently large datasets and programs that take such possibilities into account can compensate.

That is, it "non-random mutation" is only aproblem for phylogeny if one does not take it into account. Unfortunately for Borger, who claims that NRM essentially falsify all phylogenetic reconstructions, it is at best a minor problem.


This message is a reply to:
 Message 49 by Admin, posted 03-03-2003 10:15 AM Admin has not yet responded

    
Prev123
4
Newer Topic | Older Topic
Jump to:


Copyright 2001-2018 by EvC Forum, All Rights Reserved

™ Version 4.0 Beta
Innovative software from Qwixotic © 2019