facebook
twitter
rss
account
search
search
 

Evolutionary clues in ancient bison bones

Jan. 31, 2012 at 4:16 PM   |   Comments

1 of 2
| License Photo
ADELAIDE, Australia, Jan. 31 (UPI) -- Ancient DNA from 30,000-year-old bison bones discovered in a Canadian goldmine show how animals adapt to rapid environmental change, researchers say.

Scientists from Australia's University of Adelaide say the DNA was analyzed in a study of how special genetic modifications can turn genes on and off without altering the DNA sequence itself.

This kind of change, called "epigenic," can occur rapidly between generations without requiring the time for standard evolutionary processes and could explain how animal species are able to respond to rapid climate change, they said.

Researchers said it is possible to accurately measure epigenetic modifications in extinct animals and populations such as the bison found in permafrost in Canada's Yukon region.

"The climate record shows that very rapid change has been a persistent feature of the recent past, and organisms would need to adapt to these changes in their environment equally quickly," Adelaide researcher Alan Cooper said. "Standard mutation and selection processes are likely to be too slow in many of these situations."

"Epigenetics is challenging some of our standard views of evolutionary adaptation, and the way we think about how animals use and inherit their DNA," he said.

Topics: Alan Cooper
© 2012 United Press International, Inc. All Rights Reserved. Any reproduction, republication, redistribution and/or modification of any UPI content is expressly prohibited without UPI's prior written consent.
Recommended UPI Stories
Most Popular
1
Hurricane Katrina nine years later
2
Latvia boasts world's first net for migrating bats
3
Apple reportedly delays launch of rumored iWatch
4
New space debris monitoring facility set for Australia
5
Type Ia supernovas: the zombies of the cosmos
Trending News
Video
x
Feedback