’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

Netanyahu ‘spat in our face,’ White House officials said to say
2015-01-23 22:28
The White House’s outrage over Prime Minister Benjamin Netanyahu’s plan to speak before Congress in March — a move he failed to coordinate with the administration — began to seep through the diplomatic cracks on Friday, with officials telling Haaretz the Israeli leader had “spat” in President Barack Obama’s face. “We thought we’ve seen everything,” the newspaper quoted an unnamed senior ...
The Return of the Protected Jewish Minority in Europe
2015-01-23 2:53
Contrary to the standard narratives of Jewish ‘history,’ a prominent feature of the historical presence of Jews in Europe has been their protected status. The common context for this status was a symbiotic relationship between the Jewish minority and exploitative or tyrannical elites. As agents of the feared elite, as foreigners, as exploiters in their own right, and with interests ...
Truth Revealed: McCain’s ‘Moderate Rebels’ in Syria ARE ISIS
2015-01-23 1:50
Poor John McCain and Lindsey Graham, Washington’s real first couple. They only want to arm the ‘moderate opposition’ in Syria. Three years on, how come their master plan isn’t working, while ISIS has grown so strong? Despite what media lauded as, “the largest demonstration in France’s history – bigger than liberation at the end of WWII!” (can you rightly compare the ...
European 'No-Go' Zones: Fact or Fiction?
2015-01-22 0:37
Comment: This is an interesting article about Muslim no-go Zones in Europe. However, keep in mind that the focus in this piece is not addressing the root of the problem, but a symptom of the problem. Yes, there is an issue with large Islamic colonies in Europe today, but the article mentions nothing about who has changed the immigration laws ...
A Radical Traditionalist Critique of the Anti-Islam Movement
2015-01-22 0:20
The terrorist attack against the staff at the magazine Charlie Hebdo in Paris shook an entire continent. In a European climate in which protests against the perceived Islamization of our civilizational sphere becomes ever more widespread, showing in increased electoral success for moderate nationalist parties, as well as in expressions of mass public dissent, the recent resurgence of violent Islamic ...
More News »