Register | Sign In


Understanding through Discussion


EvC Forum active members: 65 (9164 total)
2 online now:
Newest Member: ChatGPT
Post Volume: Total: 916,916 Year: 4,173/9,624 Month: 1,044/974 Week: 3/368 Day: 3/11 Hour: 0/2


Thread  Details

Email This Thread
Newer Topic | Older Topic
  
Author Topic:   Neanderthals and Cro-Magnon
derwood
Member (Idle past 1906 days)
Posts: 1457
Joined: 12-27-2001


Message 21 of 87 (40762)
05-20-2003 12:21 PM
Reply to: Message 20 by Mammuthus
05-20-2003 12:13 PM


ah, yes...
quote:
But more to the topic...todays New Scientist is reporting that a study by Morris Goodman's group (if you are out there SLPx maybe you can confirm this?) suggest that humans are about 99.4% similar to chimps in coding sequences. A recent study by Roy Britten suggested a 5% difference. The discrepancy between the two is that Goodman focused on coding sequences and Britten included non-coding.
Britten also includes the number of estimated sites in insertions and deletions. For example, the 'old way' would count a 100 base deletion as a single difference (since with rare exceptions, such deletions/insertions would have been one-time events). Britten's method would count a 100 base deletion as 100 differences.
So, applying Britten's methoid universally would simply make everything more gentically distant from everything else, and thus not really impact the relative differences at all.
quote:
Thus Goodman calls for the inclusion of P. troglodytes and P. panicus in the genus Homo with us...
He has suggesting this for years, in our 2001 paper, we suggest this.
quote:
Well, why not..I have met plenty of people who are hairier and less literate than a chimp and they are still Homo
I saw an argument by a poster at internet infidels that I thought was also relevant...he argues it does not matter how you classify other primates..the creationists will turn it around and say ok, chimps descended from humans and represent the fall of man...
Interesting.. Creationists say the wackiest things. Like evolution has stopped, or humans were the 'target' of directed evolution...

This message is a reply to:
 Message 20 by Mammuthus, posted 05-20-2003 12:13 PM Mammuthus has replied

Replies to this message:
 Message 22 by Mammuthus, posted 05-20-2003 12:25 PM derwood has replied

  
derwood
Member (Idle past 1906 days)
Posts: 1457
Joined: 12-27-2001


Message 23 of 87 (40767)
05-20-2003 2:00 PM
Reply to: Message 22 by Mammuthus
05-20-2003 12:25 PM


Re: ah, yes...
quote:
I don't know how you feel about this but I think this would tend to greatly overestimate differences if every single base difference was counted as a discrete event.
Indeed, I agree. I think thisd may be why Britten's method has sort of become a non-starter.

This message is a reply to:
 Message 22 by Mammuthus, posted 05-20-2003 12:25 PM Mammuthus has replied

Replies to this message:
 Message 24 by Mammuthus, posted 05-21-2003 4:33 AM derwood has not replied

  
Newer Topic | Older Topic
Jump to:


Copyright 2001-2023 by EvC Forum, All Rights Reserved

™ Version 4.2
Innovative software from Qwixotic © 2024