Facts, not Fantasy

Amazon Contextual Product Ads

Sunday, June 07, 2009

Weekend News (June 7 2009)

Evolution

Here is an interesting report from Science Daily (June 7 2009):

Geography And History Shape Genetic Differences In Humans

New research indicates that natural selection may shape the human genome much more slowly than previously thought. Other factors -- the movements of humans within and among continents, the expansions and contractions of populations, and the vagaries of genetic chance – have heavily influenced the distribution of genetic variations in populations around the world.

The study, conducted by a team from the Howard Hughes Medical Institute, the University of Chicago, the University of California and Stanford University, is published June 5 in the open-access journal PLoS Genetics.

In recent years, geneticists have identified a handful of genes that have helped human populations adapt to new environments within just a few thousand years—a strikingly short timescale in evolutionary terms. However, the team found that for most genes, it can take at least 50,000-100,000 years for natural selection to spread favorable traits through a human population. According to their analysis, gene variants tend to be distributed throughout the world in patterns that reflect ancient population movements and other aspects of population history. [...]

Click on the above link to continue.

2 comments:

  1. Thank you for picking up my slack! Disney World was a blast, and thank you for the email and attached beverage. :)

    ReplyDelete
  2. No problem about picking up your slack, man. I figured that I had better throw in a few coals to keep the fire burning while you were away. As for the beverage, you're welcome! I hope that you didn't spill any while opening the attachment. ;-)

    ReplyDelete

Please keep posts here respectful. Those that cross boundaries will be deleted, and then placed in a special place for future ridicule.