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:6/26/2016)... ... June 26, 2016 , ... On June 10-11, 2016, A Forever Recovery, ... Festival and World’s Longest Breakfast Table in Battle Creek, MI, where the rehabilitation facility ... home to some of the world’s leading providers of cereal and other breakfast foods. ...
(Date:6/26/2016)... ... June 26, 2016 , ... ... they have been diagnosed with endometriosis. These women need a treatment plan to ... a comprehensive approach that can help for preservation of fertility and ultimately achieving ...
(Date:6/25/2016)... ... , ... "With 30 hand-drawn hand gesture animations, FCPX users can easily customize ... Pixel Film Studios. , ProHand Cartoon’s package transforms over 1,300 hand-drawn pictures into ... Simply select a ProHand generator and drag it above media or text in the ...
(Date:6/25/2016)... (PRWEB) , ... June 25, 2016 , ... On Friday, ... presented a Bronze Wellness at Work award to iHire in recognition of their exemplary ... part of the 7th annual Maryland Workplace Health & Wellness Symposium at the BWI ...
(Date:6/24/2016)... , ... June 24, 2016 , ... June 19, 2016 ... dangers associated with chronic pain and the benefits of holistic treatments, Serenity Recovery ... are suffering with Sickle Cell Disease. , Sickle Cell Disease (SCD) is a disorder ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... , June 24, 2016 The Academy of ... recommendations that would allow biopharmaceutical companies to ... entities that make formulary and coverage decisions, a move ... of new medicines. The recommendations address restrictions ... appear on the drug label, a prohibition that hinders ...
(Date:6/24/2016)... and SAN CLEMENTE, Calif. , June 24, 2016 ... mobile pulmonary function testing company, is now able to perform sophisticated ... by ndd Medical Technologies , Inc. Patients ... hospital-based labs.  Thanks to ndd,s EasyOne PRO ® , ARL patients ... get any needed testing done in the comfort of her own ...
(Date:6/24/2016)... 2016 According to a new ... Pen Needles, Safety Pen Needles), Needle Length (4mm, 5mm, ... Mode of Purchase (Retail, Non-Retail) - Trends & Global ... the market for the forecast period of 2016 to ... Billion by 2021 from USD 1.65 Billion in 2016, ...
Breaking Medicine Technology: