Springen naar inhoud

- - - - -

Study Shows Unified Process of Evolution in Bacteria and Sexual Eukaryotes


  • Log in om te kunnen reageren

#1

Mako

    Mako


  • >1k berichten
  • 1146 berichten
  • VIP

Geplaatst op 07 april 2012 - 08:57

Study Shows Unified Process of Evolution in Bacteria and Sexual Eukaryotes

Geplaatste afbeelding

Bacteria are the most populous organisms on the planet. They thrive in almost every known environment, adapting to different habitats by means of genetic variations that provide the capabilities essential for survival. These genetic innovations arise from what scientists believe is a random mutation and exchange of genes and other bits of DNA among bacteria that sometimes confers an advantage, and which then becomes an intrinsic part of the genome.


But how an advantageous mutation spreads from a single bacterium to all the other bacteria in a population is an open scientific question. Does the gene containing an advantageous mutation pass from bacterium to bacterium, sweeping through an entire population on its own? Or does a single individual obtain the gene, then replicate its entire genome many times to form a new and better-adapted population of identical clones? Conflicting evidence supports both scenarios.
In a paper appearing in the April 6 issue of Science, researchers in MIT's Department of Civil and Environmental Engineering (CEE) provide evidence that advantageous mutations can sweep through populations on their own.

...

Lees het volledige artikel op Sciencedaily.
Bron
A word of encouragement during a failure is worth more than an hour of praise after success.
I hear, I know. I see, I remember. I do, I understand -Confucius-

Dit forum kan gratis blijven vanwege banners als deze. Door te registeren zal de onderstaande banner overigens verdwijnen.




0 gebruiker(s) lezen dit onderwerp

0 leden, 0 bezoekers, 0 anonieme gebruikers

Ook adverteren op onze website? Lees hier meer!

Gesponsorde vacatures

Vacatures