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:8/7/2020)... , ... August 06, 2020 , ... ... participate in the prestigious National STEM Scholar Program, a unique professional development program ... and project support for middle school science teachers nationwide. , Created in partnership ...
(Date:7/31/2020)... ... July 30, 2020 , ... ... Phase II contract awarded by the Joint Science & Technology Office—Chemical and Biological ... is to develop, optimize, and scale-up a highly efficient mammalian cell culture-based bioprocess ...
(Date:7/18/2020)... ... July 16, 2020 , ... A study has ... Invictus Medical Neoasis™ active noise control device to attenuate typical noises in a ... device attenuated the alarm sounds from patient monitors, ventilators and other bedside devices ...
Breaking Biology News(10 mins):
(Date:8/12/2020)... (PRWEB) , ... August 11, 2020 , ... ... a year to expand the Facioscapulohumeral Muscular Dystrophy Clinical Trial Research Network ... 2021 and 2022. The network is a consortium of academic research centers in ...
(Date:8/12/2020)... ... August 12, 2020 , ... Inc. magazine today ... leader in FDA compliance consulting has been named on its annual Inc. 5000 ... represents a unique look at the most successful companies within the American economy’s ...
(Date:8/3/2020)... ... August 03, 2020 , ... ERT, ... and CEO has been named one of the 100 most inspiring individuals in ... 100 honorees are selected based on how they have inspired their colleagues and ...
(Date:7/31/2020)... Ariz. (PRWEB) , ... July 29, 2020 , ... R3 ... joint injections for only $3950. With 50 million stem cells total, patients may choose ... stem cell therapy works for arthritic joints (BMC Musculoskelet Disord. 2016). At R3 International, ...
Breaking Biology Technology:
Cached News: