Navigation Links
Biologists turn back the clock to understand evolution of sex differences
Date:5/3/2012

Sex differences account for some of the most of the spectacular traits in nature: the wild colours of male guppies, the plumage of peacocks, tusks on walruses and antlers on moose. Sexual conflict the battle between males and females over mating is thought to be a particularly potent force in driving the evolution traits that differ in males and females.

However, the genetic processes responsible for producing such traits are not well understood, nor how they evolved from their simpler less elaborate ancestral forms. We tend to assume that each tiny step in evolution is an advantage. But are they really?

To investigate, a research team led by Locke Rowe of the Department of Ecology and Evolutionary Biology at the University of Toronto with collaborators Ehab Abouheif of the Biology Department at McGill University, and Abderrahman Khila of Toronto and McGill, found a way to recreate those incremental steps, turning back the evolutionary clock and watching the transformation of simple antennae into more elaborate ones. The antennae are used to grasp females during mating interactions, and the researchers were able to measure their increasing utility in this new function as they were increasingly elaborated. The study entitled "Function, developmental genetics, and fitness consequences of a sexually antagonistic trait" is being published in Science May 4.

The study looks specifically at water striders, Rheumatobates rileyi, in which the battle of the sexes is evident in the struggles on the water's surface during mating. Males benefit by mating frequently, females by mating infrequently: both have developed traits to give them the upper hand.

"Over evolutionary time these male and female traits tend to escalate in a manner analogous to an arms race," says Rowe.

A key difference between the sexes is the male water striders' antennae, which have evolved from typical sensory devices to large and ela
'/>"/>

Contact: Kim Luke
Kim.luke@utoronto.ca
416-978-4352
McGill University
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Caltech biologists spy on the secret inner life of a cell
2. Biologists, educators recognize excellence in evolution education
3. Caltech geobiologists discover unique magnetic death star fossil
4. Biologists discover gene behind plant sex mystery
5. Queens University biologists find new environmental threat in North American lakes
6. Biologists learn structure, mechanism of powerful molecular motor in virus
7. Biologists discover link between CGG repeats in DNA and neurological disorders
8. Biologists solve mystery of black wolves
9. Cleaning up oil spills can kill more fish than spills themselves, say Queens biologists
10. Plant biologists discover gene that switches on essence of male
11. Two innovative University of Texas at Austin biologists become HHMI Early Career Scientists
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Biologists turn back the clock to understand evolution of sex differences
(Date:11/4/2014)... (November 4, 2014) — Think about the way our ... do neighboring cells know that they are supposed to ... do these tissues find the correct place and alignment? ... these crucial questions. , In a new study, UM ... communicate with their surrounding neighbors, at the head-trunk region. ...
(Date:11/4/2014)... OXFORD, England , November 4, 2014 ... expansion and vertical market growth   Fuel3D ... it has closed a funding round totaling $6.4 million (£4 ... (£1.6 million) funding secured earlier this year and paves the ... product in 2015. The funding round was led ...
(Date:11/4/2014)... 4, 2014   Neurotechnology , a provider ... the latest version of its fingerprint matching algorithm ... MINEX evaluation organized by NIST. The MINEX ... the INCITS 378 fingerprint standard template format. MINEX ... tenders in the United States ...
Breaking Biology News(10 mins):The inside story: How the brain and skull stay together 2Fuel3D Secures $6.4 Million in Expansion Funding 2Fuel3D Secures $6.4 Million in Expansion Funding 3Neurotechnology Places Second in Ongoing MINEX Ranking for Fingerprint Matching Algorithms 2Neurotechnology Places Second in Ongoing MINEX Ranking for Fingerprint Matching Algorithms 3
... about Australian landscapes will soon be only a ... and non-profit sectors thanks to a partnership between ... to CSIRO Principal Research Scientist Dr Alex Held, ... AusCover facility, the partnership aims to provide greater ...
... it remains a mystery why the cerebral pressure in certain ... blood circulation is disrupted and after a while parts of ... a stroke. This is how dementia takes its insidious path. ... of dementia in Europe can be attributed to rising blood ...
... includes a University of California, Davis, plant scientist has identified a ... past and future global change. While earlier studies have found ... carbon sink, or storage, the new study published this week in ... found that part of that sink is only temporary. "It,s ...
Cached Biology News:Scientists and Google to keep an eye on environment 2Pressure switch inside the head 2Carbon buried in the soil rises again 2
(Date:11/18/2014)... Calif. , Nov. 18, 2014 Cord ... platinum sponsor of the 10th Annual World Stem Cell Summit, ... medicine stakeholders. The 2014 World Stem Cell Summit will be ... San Antonio, Texas . The ... and development of lifesaving cures and therapies, convening the most ...
(Date:11/18/2014)... pH measurement and control is vital in a ... food and beverage industries. But what exactly is pH, ... sensors work? METTLER TOLEDO has produced a guide to ... these questions and more. , METTLER TOLEDO provides a ... The actual sensor, the pH electrode, is therefore the ...
(Date:11/18/2014)... American Process Inc. (Atlanta, GA) and ... with researchers at Georgia Institute of Technology, Clark ... USDA’s Forest Products Laboratory to develop ultra-strong, lightweight ... a rapidly emerging high performance nanomaterial extracted from ... replace heavy steel structures within cars, such as ...
(Date:11/18/2014)... Philadelphia, PA (PRWEB) November 18, 2014 ... healthcare planning and design expertise to the nation's hospitals ... is best served by those dedicating their careers to ... As a respected contributor in her respective field, Laura ... engineering expertise at the 2014 Winter Simulation Conference. ...
Breaking Biology Technology:Cord Blood Registry Sponsors 2014 World Stem Cell Summit 2Cord Blood Registry Sponsors 2014 World Stem Cell Summit 3pH Guide from METTLER TOLEDO Explains Measurement, Theory and Practice of pH Applications 2American Process Inc. Announces Partnership to Develop Ultra-Strong, Lightweight Automotive Components Using Nanotechnology from Nature 2American Process Inc. Announces Partnership to Develop Ultra-Strong, Lightweight Automotive Components Using Nanotechnology from Nature 3Array Healthcare Simulation Expert Slated to Speak at Winter Simulation Conference 2
... PARIS, April 30 ExonHit Therapeutics S.A.,(Alternext: ALEHT), ... its Supervisory Board., Following the annual shareholders, ... 25th, 2008, Mr. Edmund Olivier de Vezin,s appointment ... of the Board, expired,as he has reached the ...
... ONXX ) today announced that it will webcast ... and provide a general business overview on Tuesday, May ... Time). Financial results for the,first quarter ended March 31, ... parties may access a live webcast of the presentation ...
... (Nasdaq: ALGN ) today announced that its board ... to $50 million, effective,immediately., "We are confident in ... to grow the business," said Ken Arola, vice president ... cash to our,shareholders through a repurchase program will contribute ...
Cached Biology Technology:Frederic Desdouits Appointed Member of the Supervisory Board of ExonHit Therapeutics 2Frederic Desdouits Appointed Member of the Supervisory Board of ExonHit Therapeutics 3Align Technology Announces $50 Million Stock Repurchase Program 2Align Technology Announces $50 Million Stock Repurchase Program 3
... 3F10B10. Immunogen: Synthetic peptide ... of JAB1 (Jun activation domain-binding ... Specific for the JAB1 protein. ... 293T Jurkat cell lysates). ...
Ready-to-use solution....
...
... Production Conjugated peptides or recombinant ... protocol to produce antibodies in 2 rabbits. ... ELISA test until the titer reaches 1:4,000 ... titer Protein G purification Antibodies are ...
Biology Products: