HOME >> BIOLOGY >> NEWS
Biology behind homosexuality in sheep, study confirms

PORTLAND, Ore. Researchers in the Oregon Health & Science University School of Medicine have confirmed that a male sheep's preference for same-sex partners has biological underpinnings.

A study published in the February issue of the journal Endocrinology demonstrates that not only are certain groups of cells different between genders in a part of the sheep brain controlling sexual behavior, but brain anatomy and hormone production may determine whether adult rams prefer other rams over ewes.

"This particular study, along with others, strongly suggests that sexual preference is biologically determined in animals, and possibly in humans," said the study's lead author, Charles E. Roselli, Ph.D., professor in the Department of Physiology and Pharmacology, OHSU School of Medicine. "The hope is that the study of these brain differences will provide clues to the processes involved in the development and regulation of heterosexual, as well as homosexual, behavior."

The results lend credence to previous studies in humans that described anatomical differences between the brains of heterosexual men and homosexual men, as well as sexually unique versions of the same cluster of brain cells in males and females.

"Same-sex attraction is widespread across many different species." said Roselli, whose laboratory collaborated with the Department of Animal Sciences at Oregon State University and the USDA Agricultural Research Service's U.S. Sheep Experiment Station in Dubois, Idaho.

Kay Larkin, Ph.D., an OHSU electron microscopist who performed laboratory analysis for the study, said scientists now have a marker that points to whether a ram may prefer other rams over ewes.

"There's a difference in the brain that is correlated with partner preference rather than gender of the animal you're looking at," she said.

About 8 percent of domestic rams display preferences for other males as sexual partners. Scientists don't believe it's r
'"/>

Contact: Jonathan Modie
modiej@ohsu.edu
503-494-8231
Oregon Health & Science University
8-Mar-2004


Page: 1 2 3

Related biology news :

1. NIGMS funds Center for Quantitative Biology
2. Biology of aging
3. Chemistry meets Biology
4. Annual Chemical Biology Symposium at Yale May 14, 2004
5. Institute for Systems Biology, Pacific Northwest National Laboratory announce collaboration
6. Light Biology, a biotech company based on UT Southwestern technology, bought by NimbleGen Systems
7. Biochemistry and Molecular Biology: Research at the Interface of Biochemistry and Human Health
8. Experimental Biology 2004 - Translating the Genome
9. ASPB Plant Biology 2004 in Walt Disney World
10. The American Society for Biochemistry and Molecular Biology meets in Boston
11. Experimental Biology 2004 meets in Washington, D.C. April 17-21

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/13/2017)... , April 13, 2017 UBM,s Advanced Design ... will feature emerging and evolving technology through its ... Summits will run alongside the expo portion of the ... panels and demonstrations focused on trending topics within 3D ... design and manufacturing event will take place June 13-15, 2017 ...
(Date:4/11/2017)... MELBOURNE, Florida , April 11, 2017 ... "Company"), a security technology company, announces the appointment of independent ... John Bendheim to its Board of Directors, furthering the ... ... behalf of NXT-ID, we look forward to their guidance and ...
(Date:4/4/2017)... --  EyeLock LLC , a leader of iris-based identity ... and Trademark Office (USPTO) has issued U.S. Patent No. ... iris image with a face image acquired in sequence ... th issued patent. "The issuance ... multi-modal biometric capabilities that have recently come to market ...
Breaking Biology News(10 mins):
(Date:7/26/2017)... 26, 2017  Nurse practitioners play a crucial role in ... a Merck Manuals survey released today. The survey ... that most (88 percent) believe they spend at least half ... ... Merck Manuals survey of 210 nurse practitioners finds that ...
(Date:7/25/2017)... CT (PRWEB) , ... July 25, 2017 , ... ... products that enhance the microbiome and improve efficiency of livestock farming while reducing ... that it has licensed additional intellectual property from Cornell University. , These ...
(Date:7/24/2017)... ... July 24, 2017 , ... Each year, ... who have proven their superior service quality as rated by hiring professionals and ... industry leader based on service quality ratings from their placed talent. , Fewer ...
(Date:7/20/2017)... ... July 20, 2017 , ... Resoundant, ... radiology and imaging centers around the U.S. that offer MR Elastography for liver ... to needle biopsy for staging liver fibrosis assessment. , “MRE:connect was created ...
Breaking Biology Technology:
Cached News: