Navigation Links
Study reveals potential evolutionary role for same-sex attraction
Date:2/4/2010

Male homosexuality doesn't make complete sense from an evolutionary point of view. It appears that the trait is heritable, but because homosexual men are much less likely to produce offspring than heterosexual men, shouldn't the genes for this trait have been extinguished long ago? What value could this sexual orientation have, that it has persisted for eons even without any discernible reproductive advantage?

One possible explanation is what evolutionary psychologists call the "kin selection hypothesis." What that means is that homosexuality may convey an indirect benefit by enhancing the survival prospects of close relatives. Specifically, the theory holds that homosexual men might enhance their own genetic prospects by being "helpers in the nest." By acting altruistically toward nieces and nephews, homosexual men would perpetuate the family genes, including some of their own.

Two evolutionary psychologists, Paul Vasey and Doug VanderLaan of the University of Lethbridge, Canada tested this idea for the past several years on the Pacific island of Samoa. They chose Samoa because males who prefer men as sexual partners are widely recognized and accepted there as a distinct gender categorycalled fa'afafineneither man nor woman. The fa'afafine tend to be effeminate, and exclusively attracted to adult men as sexual partners. This clear demarcation makes it easier to identify a sample for study.

Past research has shown that the fa'afafine are much more altruistically inclined toward their nieces and nephews than either Samoan women or heterosexual men. They are willing to babysit a lot, tutor their nieces and nephews in art and music, and help out financiallypaying for medical care and education and so forth. In a new study, the scientists set out to unravel the psychology of the fa'afafine, to see if their altruism is targeted specifically at kin rather than kids in general.

They recruited a large sample of fa'afafine, and compar
'/>"/>

Contact: Catherine Allen-West
cwest@psychologicalscience.org
202-293-9300
Association for Psychological Science
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Study shows male erectile dysfunction drug enhances fetal growth in female sheep
2. LSTM begins £0.5 million malaria study in Burkina Faso
3. University of Oklahoma study reveals red hot results
4. Big study of dirty air inversions
5. Evolution impacts environment, challenging traditionally held view, UC Riverside study finds
6. Simulation study may help Parkinsons patients retain driving skills
7. Most patients gain weight after getting a new knee, UD study finds
8. Study recommends better handling of milk in restaurants
9. Grant to study how cells sense electric fields
10. Antioxidants arent always good for you and can impair muscle function, study shows
11. Cell-enriched fat grafts improve long term graft retention in preclinical study
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/19/2014)... 18, 2014   LaunchKey , the first decentralized ... and Internet of Things era, today announced the close ... round was led by Metamorphic Ventures with participation from ... VegasTechFund, and others.  LaunchKey has raised $4 million to ... its team and bring LaunchKey to market in 2015. ...
(Date:12/17/2014)... --Research and Markets ( http://www.researchandmarkets.com/research/9zq33j/global_chemical ) ... Chemical Sensor Market 2015-2019" report to their ... One major trend upcoming in this ... in biomedical applications. Chemical sensors help in recording ... during surgical procedures. The Global Chemical Sensor market ...
(Date:12/11/2014)... -- That blood pressure plays a role in human health has ... term for high blood pressure – was first described as ... that,s used in measuring blood pressure was invented in 1896. ... hypertension, its triggers and its effects. In fact, recent findings ... best ways to treat it. For example, a ...
Breaking Biology News(10 mins):LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 3Global Chemical Sensor Market 2015-2019: Key Vendors are Abbott Laboratories, Bayer, Hoffmann La-Roche, Johnson & Johnson, NGK Spark Plugs and Robert Bosch 2Research points to need for new approaches to treatment of high blood pressure 2Research points to need for new approaches to treatment of high blood pressure 3Research points to need for new approaches to treatment of high blood pressure 4
... identified a novel function for an enzyme that plays a ... also known as ARDS. The finding offers a new ... and injury. The research will be published in the journal ... 29. ARDS is an often fatal complication of bacterial ...
... ripen in our gardens, we watch them turn gradually ... tasty fruits. This familiar and seemingly commonplace transformation ... well-regulated albeit highly complex manner. For generations, agriculturalists ... flavor, shelf-life, and nutrient composition, more or less, one ...
... in French and Spanish . ... States are joining forces to protect and conserve the ... America,s shared environment. Although the monarch butterfly ( ... its unique multigenerational migration spanning the continent is considered ...
Cached Biology News:UIC researchers make promising finding in severe lung disease 2The 21st century tomato 2The 21st century tomato 3Continental plan to protect the monarch's migratory journey 2
(Date:12/24/2014)... Dec. 23, 2014 Sigma-Aldrich Corporation (NASDAQ: ... waiting period under the Hart-Scott-Rodino Antitrust Improvements Act ... on December 22, 2014, thereby completing the U.S. ... the acquisition of the Company by Merck KGaA, ... satisfies another condition to closing the transaction, which ...
(Date:12/22/2014)... 22, 2014 The Center for ... of technical training across the life sciences industry, has ... (SCDM) to provide the organization's members with discounted ... access to the more than 350 sessions across 80 ... 10% off when registering for a public course ...
(Date:12/22/2014)... Dec. 22, 2014  Alternative Energy & Environmental ... has signed a letter of intent to acquire ... and patented a nanotechnology-based development platform used to ... enable rapid on-site collection and testing to identify ... issues in an immediate, non-invasive and cost-effective manner. ...
(Date:12/22/2014)... 2014 The American Journal ... original research, reviews and editorials addressing developments and ... today published a provocative article exploring the role ... and potential treatment of prostate cancer. , ... proposes the possibility that there could be a ...
Breaking Biology Technology:Acquisition of Sigma-Aldrich by Merck KGaA, Darmstadt, Germany, Receives U.S. Antitrust Clearance 2Acquisition of Sigma-Aldrich by Merck KGaA, Darmstadt, Germany, Receives U.S. Antitrust Clearance 3CfPIE Announces Partnership with the Society for Clinical Data Management 2CfPIE Announces Partnership with the Society for Clinical Data Management 3ALNE Announces Intention To Acquire BioTechPharma 2Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 2Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 3Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 4
... Tandem Labs, a leading contract,research organization ... services to the pharmaceutical,industry, announced that it ... 4000(TM) LC/MS/MS systems for its New England ... facility,s current triple,quadrupole LC/MS/MS capacity, allowing it ...
... Identify Pathways and ... Metabolomic Data, REDWOOD CITY, Calif., Oct. 9 ... to help life science researchers,generate insights from biological ... within Ingenuity,Pathways Analysis to help researchers understand metabolomics ...
... SAN DIEGO, Oct. 8 SGX Pharmaceuticals, Inc.,(Nasdaq: ... on October 11,2007, at 1:00 p.m. Pacific Daylight Time. ... will provide an overview of the,Company,s oncology pipeline. The ... the Palace Hotel in San Francisco. A live ...
Cached Biology Technology:Tandem Labs' New England Facility Doubles Discovery Support Capacity - Increasing Foothold in New England 2Ingenuity Systems Launches New Metabolomics Solution Within IPA 2
... SpliceArray is a new generation of ... SpliceArray Service enables you to rapidly elucidate ... to be relevant for drug discovery. The ... patented probe design and customized analysis with ...
... angle system, 220-240 V, is used to resolve ... fragments by pulsed field gel electrophoresis (PFGE). The ... pump, 14 x 13 cm casting stand with ... thick comb, screened cap, disposable plug molds, 12 ...
... inhibits protein synthesis. Acts by inhibiting ... Reported to induce apoptosis in a ... cells, Jurkat cells, ventricular myocytes, and ... and immediate early gene induction. Selective ...
Recommended for use as a cell culture substratum at 0.1-0.2 mg/cm 2 or 5-10 μl/cm 2 . Optimal concentration depends on cell type as well as the application or research objectives. Type B...
Biology Products: