RSS 2.0 Feed

» Welcome Guest Log In :: Register

  Topic: Predicting evolution, it's been a bad year for creationists< Next Oldest | Next Newest >  

Posts: 10127
Joined: Oct. 2005

(Permalink) Posted: May 20 2006,15:20   

Scientists broke a gene which enabled a behavior, then selected for the behavior, and watched mutation and selection fix the gene.


Posts: 846
Joined: April 2005

(Permalink) Posted: May 20 2006,15:35   

looks pretty slick.

show it to Pim or Wes and see if they can get the full article for the thumb.


Posts: 1898
Joined: Jan. 2006

(Permalink) Posted: May 20 2006,20:22   

Wow. Just wow.

Who said that ev'ry wish would be heard and answered
When wished on the morning star
Somebody thought of that, and someone believed it
Look what it's done so far

The Daily Wingnut


Posts: 10127
Joined: Oct. 2005

(Permalink) Posted: May 21 2006,03:04   

Given all the things that've happened in the last year or so, aren't you glad you're not a loser creationist?


Posts: 1200
Joined: Jan. 2006

(Permalink) Posted: May 21 2006,03:12   

Talking about adaptive mutations, there's a paper in Nature.

Nature 441, 310-314 (18 May 2006) | doi:10.1038/nature04677; Received 3 January 2006; Accepted 23 February 2006

Evolution of an obligate social cheater to a superior cooperator

Francesca Fiegna1, Yuen-Tsu N. Yu1, Supriya V. Kadam1 and Gregory J. Velicer1

Top of page
Obligate relationships have evolved many times and can be parasitic or mutualistic. Obligate organisms rely on others to survive and thus coevolve with their host or partner. An important but little explored question is whether obligate status is an evolutionarily terminal condition or whether obligate lineages can evolve back to an autonomous lifestyle. The bacterium Myxococcus xanthus survives starvation by the social development of spore-bearing fruiting bodies. Some M. xanthus genotypes defective at fruiting body development in isolation can nonetheless exploit proficient genotypes in chimaeric groups. Here we report an evolutionary transition from obligate dependence on an altruistic host to an autonomous mode of social cooperation. This restoration of social independence was caused by a single mutation of large effect that confers fitness superiority over both ancestral genotypes, including immunity from exploitation by the ancestral cheater. Thus, a temporary state of obligate cheating served as an evolutionary stepping-stone to a novel state of autonomous social dominance.


Posts: 71
Joined: Mar. 2006

(Permalink) Posted: May 22 2006,12:05   

I don't know.  I mean they're still just bacteria.  :p

"For everything else, there's Mastertard"

Henry J

Posts: 4565
Joined: Mar. 2005

(Permalink) Posted: May 23 2006,12:19   

Re "I don't know.  I mean they're still just bacteria."

Well, yeah!

Now that that's settled...


  6 replies since May 20 2006,15:20 < Next Oldest | Next Newest >  


Track this topic Email this topic Print this topic

[ Read the Board Rules ] | [Useful Links] | [Evolving Designs]