Navigation Links
Males' Y Chromosome Not in Decline
Date:1/13/2010

Countering common belief, study shows rapid genetic change in both humans and chimpanzees

WEDNESDAY, Jan. 13 (HealthDay News) -- The Y chromosome, found only in males, has evolved faster than expected in humans and chimpanzees over the past 6 million years since the two species emerged from a common ancestor, researchers report.

The new study challenges the widely held belief that the mammalian Y chromosome is slowly decaying or stagnating.

The Y chromosome is present in males (who have one Y and one X chromosome) but not in females (who have two X chromosomes).

"The region of the Y that is evolving the fastest is the part that plays a role in sperm production. The rest of the Y is evolving more like the rest of the genome, only a little bit faster," study first author Jennifer Hughes, of the Whitehead Institute for Biomedical Research in Cambridge, Mass., said in a news release from the Massachusetts Institute of Technology. Hughes is a postdoctoral researcher in the lab of Whitehead director David Page.

It had been believed that the human and chimp Y chromosomes would be highly similar. But this first comprehensive interspecies comparison of Y chromosomes revealed major differences in structure and gene content.

For example, the chimp Y chromosome has lost one-third to one-half of the human Y chromosome genes, which is a significant change in a relatively short period of evolutionary time. The changes in the Y chromosome are like a house undergoing continual renovation, one researcher explained.

"People are living in the house, but there's always some room that's being demolished and reconstructed. And this is not the norm for the genome as a whole," Whitehead director David Page said in the news release.

"This work clearly shows that the Y is pretty ingenious at using different tools than the rest of the genome to maintain diversity of genes. These findings demonstrate that our knowledge of the Y chromosome is still advancing," added Wes Warren, assistant director of the Washington University Genome Center, which was involved in the research.

The study findings are published in the Jan. 13 online edition of the journal Nature.

More information

The U.S. National Library of Medicine has more about the Y chromosome.



-- Robert Preidt



SOURCE: Massachusetts Institute of Technology, news release, Jan. 13, 2010


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. Females avoid incest by causing male relatives to leave home
2. Researchers discover correlation between GERD and obesity in females
3. New upper limit defined for normal ALT in adolescent males
4. Females decide whether ambitious males float or flounder
5. For Males, Video Game Rewards Are All in the Mind
6. Pursuit of Females Dates Way, Way Back
7. The Decline of Males, Why They Die First; at White Plains Hospital September 17
8. Young African-American Males Face Mental Health Crisis; Experts Call For New Treatment Strategies and Better Access to Care
9. Hypertension May Hit Black Males Earlier
10. Living with females extends the reproductive life of the male mouse, says Penn veterinary researcher
11. Remuda Ranch Seeks to Increase Awareness of Eating Disorders Among Males During National Eating Disorders Awareness Week (NEDAW), February 22-28, 2009
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/25/2016)... Lewisville, TX (PRWEB) , ... June 25, 2016 , ... ... in the United States, named Dr. Sesan Ogunleye, as the Medical Director of its ... be the facility Medical Director of our new Mesquite location,” said Dr. James M. ...
(Date:6/25/2016)... ... , ... Conventional wisdom preaches the benefits of moderation, whether it’s a matter ... bar too high can result in disappointment, perhaps even self-loathing. However, those who set ... , Research from PsychTests.com reveals that behind the tendency to set low ...
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... Marcy was in a crisis. Her son ... lash out at his family verbally and physically. , “When something upset him, he couldn’t ... would use it. He would throw rocks at my other children and say he was ...
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... Comfort Keepers® ... American Cancer Society and the Road To Recovery® program to drive cancer patients to ... and other adults to ensure the highest quality of life and ongoing independence. ...
(Date:6/24/2016)... New York, NY (PRWEB) , ... June 24, ... ... lifestyle publication Haute Living, is proud to recognize Dr. Barry M. Weintraub as ... believes that “the most beautiful women in the world, and the most handsome ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... , June 24, 2016 ... the "Structural Electronics 2015-2025: Applications, Technologies, Forecasts" ... In-Mold Electronics, Smart Skin, Structural ... Structural electronics involves electronic and/or ... protective structures, replacing dumb structures such as vehicle ...
(Date:6/24/2016)... Research and Markets has announced the addition of the ... to their offering. ... World Market for Companion Diagnostics covers the world market for ... report includes the following: , World IVD ... (N. America, EU, ROW), 2015-2020 , World IVD Companion ...
(Date:6/24/2016)... June 24, 2016  Arkis BioSciences, a leading ... and more durable cerebrospinal fluid treatments, today announced ... Series-A funding is led by Innova Memphis, followed ... other private investors.  Arkis, new financing will accelerate ... the market release of its in-licensed Endexo® technology. ...
Breaking Medicine Technology: