Navigation Links
Worm Study Points to Sexuality's Origins
Date:10/25/2007

Scientists tweaked genes to switch the wrigglers' orientation

THURSDAY, Oct. 25 (HealthDay News) -- Sexual attraction is hard-wired into the brains of small worms called nematodes, say scientists who genetically manipulated some of the creatures to make them attracted to the same sex.

The finding might give some insight into sexual attraction generally, the researchers said.

"Our conclusions are narrow in that they are about worms and how attraction behaviors are derived from the same brain circuit. But an evolutionary biologist will consider this to be a potentially common mechanism for sexual attraction," biology professor Erik Jorgensen, scientific director of the Brain Institute at the University of Utah, said in a prepared statement.

"The conclusion is that sexual attraction is wired into brain circuits common to both sexes of worms and is not caused solely by extra nerve cells added to the male or female brain," he said. "The reason males and females behave differently is that the same nerve cells have been rewired to alter sexual preference."

Nematodes, which live in the soil and eat bacteria, have the same genes as many other animals and are often used as models for human research.

It's difficult to say what these findings in nematodes mean in terms of human sexual orientation, but "it raises the possibility that sexual preference is wired in the brain," Jorgensen said. "Humans are subject to evolutionary forces just like worms. It seems possible that if sexual orientation is genetically wired in worms, it would be in people, too. Humans have free will, so the picture is more complicated in people."

The study was published online Thursday in the journal Current Biology and was expected to be published in the Nov. 6 print issue.

More information

The Nemours Foundation has more about sexual attraction/orientation.



-- Robert Preidt



SOURCE: University of Utah, news release, Oct. 25, 2007


'/>"/>
Copyright©2007 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. Rural Canadians travel far for specialists: study
2. A new study surpasses Gene Therapy Hurdle
3. Tomato Sauce reduces Cancer Risk- Study
4. A question on study of Adult Stem Cell
5. Study on obesity and heart failure
6. National Lung Study in the process
7. Marijuana gateway theory strengthened by study of twins
8. Old theory of adaptation confirmed by new study
9. Study casts doubt on keyboard ills
10. Gene study links endometriosis, infertility
11. Study reveals how stress can make you sick
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/27/2016)... ... 2016 , ... TopConsumerReviews.com recently awarded their highest five-star rating to Best Buy ... in the United States and Canada wear eyeglasses. Once considered to be a purely ... make a fashion statement. Even celebrities use glasses as a way of creating an ...
(Date:6/26/2016)... (PRWEB) , ... June 26, 2016 , ... Brent Kasmer, a legally blind and certified ... be personalized through a fitness app. The fitness app plans to fix the two major ... only offer a one size fits all type program , They don’t eliminate ...
(Date:6/25/2016)... , ... June 25, 2016 , ... "With 30 hand-drawn ... specific project," said Christina Austin - CEO of Pixel Film Studios. , ProHand ... all within Final Cut Pro X . Simply select a ProHand generator and ...
(Date:6/25/2016)... Montreal, Canada (PRWEB) , ... June 25, 2016 , ... ... the pursuit of success. In terms of the latter, setting the bar too high ... low, risk more than just slow progress toward their goal. , Research from ...
(Date:6/24/2016)... ... June 24, 2016 , ... The Pulmonary ... Dallas that it will receive two significant new grants to support its work ... marked its 25th anniversary by recognizing patients, medical professionals and scientists for their ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... SAN CLEMENTE, Calif. , June 24, 2016 /PRNewswire/ ... pulmonary function testing company, is now able to perform sophisticated lung ... ndd Medical Technologies , Inc. Patients are ... labs.  Thanks to ndd,s EasyOne PRO ® , ARL patients like ... any needed testing done in the comfort of her own home. ...
(Date:6/24/2016)... Belgium , June 24, 2016 ... the appointment of Dr. Edward Futcher ... Non-Executive Director, effective June 23, 2016.Dr. Futcher was ... Nominations and Governance Committees.  As a non-executive member ... independent expertise and strategic counsel to VolitionRx in ...
(Date:6/23/2016)... , June 23, 2016 Any dentist who ... challenges of the current process. Many of them do not ... the technical difficulties and high laboratory costs involved. And those ... offer it at such a high cost that the majority ... Dr. Parsa Zadeh , founder of Dental ...
Breaking Medicine Technology: