’Odd Little Creature’ Skips Sex and Eats DNA
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
Latest News from our Front Page
The Josh Duggar Incident Reveals The Tactics And Hypocrisy of SJWs
Last week, In Touch Weekly broke the news that Josh Duggar, eldest son of Jim Bob and Michelle Duggar from TLCâ€™s 19 Kids and Counting, had molested five under-aged girls in 2002 and 2003. Josh, who was 14 at the time, was accused of fondling his victims, touching their breasts and genitals while they slept.
A police report was released shortly ...
15 More Men of South Asian Descent Charged With Child Sex Offences
Police in Keighley, West Yorkshire have charged 14 men and a 16-year-old boy with sex offences including the rape of a girl under the age of 16. The offences relate primarily to one female victim, with one allegation involving a second who was also under 16 at the time.
The offences are alleged to have occurred between 2011 and 2012. In ...
Anti-Semitic fliers left on Chevy Chase driveways
Five streets in Chevy Chase, Md., were papered with anti-Semitic fliers on Wednesday morning.
Montgomery County police are looking for the person or people who left the hate-filled leaflets on almost every driveway on the streets.
â€śThis is very disturbing. My community is definitely disturbed,â€ť said Jean Sperling, the village manager of Martinâ€™s Additions, the community where the fliers were found. Sperling ...
German court says ex-SS officer unfit for trial
Prosecutors in the northern German city of Hamburg have dropped their probe into a 93-year-old former Nazi SS officer. Gerhard Sommer, who suffers from dementia, allegedly took part in a World War II massacre in Italy.
Gerhard Sommer, a former company commander of a mechanized infantry division, had been accused of participating in the mass murder of 560 civilians by Nazi ...
The Age of Disinformation
I have been a professional meteorologist for 36 years. Since my debut on television in 1979, I have been an eyewitness to the many changes in technology, society, and how we communicate. I am one who embraces change, and celebrates the higher quality of life we enjoy now thanks to this progress.
But, at the same time, I realize the instant ...
|More News » |