’Odd Little Creature’ Skips Sex and Eats DNA
2012-12-03 0:00

From: LiveScience

The tiny, all-female bdelloid rotifers have endured the past 80 million years without sex. New research shows that gobbling up foreign DNA from other simple life-forms might be the asexual animal’s secret to survival.

In the study, scientists discovered that up to 10 percent of the active genes in microscopic bdelloids comes from bacteria and other organisms like fungi and algae. The finding adds to "the weirdness of an already odd little creature," said Alan Tunnacliffe, a University of Cambridge professor and lead author of the study.


A pair of bdelloids probably don’t get excited about each other as two humans in such close proximity might. Bdelloids don’t need sex to reproduce.


"We don’t know how the gene transfer occurs, but it almost certainly involves ingesting DNA in organic debris, which their environments are full of," Tunnacliffe explained in a statement. "Bdelloids will eat anything smaller than their heads!"

Many asexual creatures are thought to be doomed to extinction due to the lack of genetic diversity and build-up of mutations that often come with reproducing from just one parent’s DNA. But bdelloids have managed to avoid such pitfalls of asexual life, diversifying into at least 400 species.

One of the critters’ more remarkable qualities is their ability to withstand extreme dehydration, which could be, in part, thanks to the alien DNA. The new study found that some of the foreign genes are activated when the bdelloids begin to dry out in their ephemeral aquatic homes. These genes also might be behind powerful antioxidants thought to protect bdelloids from the by-products of drying out.

"These antioxidants have not yet been identified, but we think that some of them result from foreign genes," Tunnacliffe added.

Bdelloids’ success could also be attributed to their potent DNA repair mechanisms, which seem to have evolved thanks to a duplicate set of genes, according to research detailed in 2008 in the journal Proceedings of the National Academy of Sciences.

The new findings were detailed in the journal PLoS Genetics Thursday (Nov. 15).


Article from: yahoo.com







Related Articles


Latest News from our Front Page

German Government Evict Poor Germans From Their Homes For Migrant Asylum Seekers
2015-09-03 2:40
This is a video of a report on replacement of poor Germans with Middle Eastern asylum seekers. This was made broudcasted on a German Left-leaning TV station on August 28, 2015. It's original title: The most poor of the poor have to vacate their homes for asylum seekers. Source: youtube.com
Black Lives Matter Radio Host Calls for Killing Whites and Police
2015-09-03 1:48
“It’s open season on killing whites and police officers." A blogtalkradio program associated with the Black Lives Matter movement spewed racist hate and called for a race war Monday, reports Breitbart. The YouTube video of the audio recording has since been removed as a violation of YouTube's policy prohibiting hate speech, but Breitbart has video (below) of the host "King Noble" making the comments, taken from ...
Irish will be an ethnic minority in Ireland by 2050
2015-09-02 22:32
The former President of Dublin City University says that Ireland’s natives will be a minority in the country by the middle of this century... Professor Ferdinand von Prondzynski was referring to unpublished and unidentified United Kingdom based research. Speaking at the conferring ceremony at DCU on Tuesday he said that the Irish in Ireland will be a minority by 2050 while ...
Immigrant Crisis Is the Final Nail in the EU Coffin
2015-09-02 21:23
One of the biggest flaws with the EU, was the idea that they could house dozens of cultures with distinct histories and languages, all under one roof, and expect them to thrive. You can’t hold 28 nations together under one union, when all of these countries have wildly different interests, expectations, and priorities. Every time the EU faces a problem, ...
Three-year-old ultra-Orthodox Jewish children told 'the non-Jews' are 'evil' in worksheet produced by London school
2015-09-02 19:43
Documents seen by The Independent show children are taught about the horrors of the Holocaust when they are still in kindergarten at the Beis Rochel boys’ school in north London. A whistle-blower, who wished to remain anonymous, has shown The Independent a worksheet given to boys aged three and four at the school. In it, children were asked to complete questions ...
More News »