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 th
'/>"/>

Copyright©2010 ScoutNews,LLC.
All rights reserved

Page: 1 2

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:10/1/2014)... 2014 Indosoft, Inc., a leading provider of ... it has added support for Sangoma Lyra ... Indosoft have a history of bringing innovative products to ... offers a significant benefit to those using Asterisk as a ... available to users of Q-Suite. , In the past decades, ...
(Date:10/1/2014)... October 01, 2014 QueenBeeTickets.com is giving music ... the singer’s upcoming North American tour, which has him traveling ... come. , Click here to view the selection ... performer’s newest album, is due to come out on October ... shortly thereafter. Bob Seger concert tickets are available for shows ...
(Date:9/30/2014)... in developing countries may have no intention of working ... one fifth of them intend to work in rural ... new study. , Health workforce shortages have been a ... western Africa. The disease initially spread rapidly in rural ... Sierra Leone and Liberia), where health workers are scarcest. ...
(Date:9/30/2014)... HealthDay Reporter TUESDAY, Sept. 30, 2014 (HealthDay ... the brakes on motherhood. And for many young women, that ... research suggests. Women in their early 20s appear most ... economic times. But, according to the new study, that means ... and beyond. The findings suggest that higher unemployment "will ...
(Date:9/30/2014)... 30, 2014 (HealthDay News) -- Sleep apnea is a potential ... points to a possible culprit behind the disorder: a "fat" ... fat deposits are increased in the tongue of obese patients ... co-director of the Sleep Center at the University of Pennsylvania ... , which will publish the findings Oct. 1. Sleep ...
Breaking Medicine News(10 mins):Health News:Indosoft Announces Q-Suite Support For Sangoma Lyra 2Health News:Bob Seger Presale Tickets: QueenBeeTickets.com Delights Fans with Discounted Tickets for All 20 Stops on Seger’s “Ride Out” Tour with The Silver Bullet Band 2Health News:Developing countries should enroll medical and nursing students from rural areas 2Health News:Developing countries should enroll medical and nursing students from rural areas 3Health News:Recessions May Thwart a Woman's Motherhood Plans Forever: Study 2Health News:Recessions May Thwart a Woman's Motherhood Plans Forever: Study 3Health News:Could a 'Fat Tongue' Be a Factor in Sleep Apnea? 2
... results with less inconvenience, study finds , WEDNESDAY, Feb. ... breast cancer surgery do just as well with three ... study suggests. , "We consider this [finding] a win-win ... health-care system," said study author Dr. Timothy J. Whelan, ...
... lower Manhattan residents suggest a link, nearly a decade ... 10 years after the 9/11 attacks, residents and workers ... Center site appear prone to persistent, sometimes severe headaches, ... study author Dr. Sara C. Crystal, an instructor in ...
... at the heart of Europe, provides a fitting setting ... Society of Cardiology Council (ESC) on Cardiovascular Nursing and ... its special theme: "Uniting to Improve Cardiovascular Practice". ... developed different ways of managing them. The idea of ...
... , BELGRADE ... www.hirucorporation.com ) and its European subsidiary MindUp BioResearch ( www.mindupbioresearch.com ... Sabera Ruzdijic,s patents. Dr. Sabera Ruzdijic is the project ... team leaders in MindUp Research project are Dr. Nikola Tanic ...
... lead to new vaccines, treatments, researchers say , WEDNESDAY, ... discovered the origin of strains of the AIDS virus ... the origin of the transmitted virus, scientists may be ... to prevent the spread of sexually transmitted HIV," study ...
... connection noted after surgical removal of tumors, study found , ... of the brain boosted levels of spiritual thinking and feeling ... connection between religious attitudes and the physical makeup of the ... 11 issue of Neuron , are based on research ...
Cached Medicine News:Health News:For Some Breast Cancer Patients, Shorter Radiation Works Well 2Health News:For Some Breast Cancer Patients, Shorter Radiation Works Well 3Health News:Exposure to 9/11 Fumes Tied to Chronic Headaches 2Health News:Exposure to 9/11 Fumes Tied to Chronic Headaches 3Health News:Nurses unite to improve cardiovascular practice 2Health News:Nurses unite to improve cardiovascular practice 3Health News:Nurses unite to improve cardiovascular practice 4Health News:Nurses unite to improve cardiovascular practice 5Health News:Nurses unite to improve cardiovascular practice 6Health News:MindUp (HIRU) Patents in the World Patent Database 2Health News:MindUp (HIRU) Patents in the World Patent Database 3Health News:Scientists Discover How HIV Is Transmitted Between Men 2Health News:Physical Changes in Brain Linked to Altered Spirituality 2
(Date:9/30/2014)...  According to their CEO, Rob Bohacs ... is going through a complete transformation with highly ... the current clinical trial management process isn,t configured ... trials, which will ultimately drive the prescription cancer ... has been recognized by the National Cancer Institute as ...
(Date:9/30/2014)... -- Alimera Sciences, Inc. (NASDAQ: ALIM ) (Alimera), ... and commercialization of prescription ophthalmic pharmaceuticals, announced today that ... Technology Growth Capital, Inc. (NYSE: HTGC ) ... under the Loan and Security Agreement that Alimera,s subsidiary ... Sciences Limited, entered into with Hercules in April of ...
(Date:9/30/2014)... , Sept. 30, 2014 A study ... (OCT), offered a new look at the composition of ... how physicians understand and treat the disease, a leading ... at Baptist Health Lexington between September 2010 and May ... the Journal of the American College of Cardiology ...
Breaking Medicine Technology:Small Denver Company Pharmatech driving a large revolution in how cancer clinical trials are managed 2Alimera Sciences Receives $25 Million Advance from Hercules Technology Growth Capital 2New Imaging Tool May Allow Tailoring of Stroke Prevention to Each Patient 2
... 15, 2011 ULURU Inc. (NYSE AMEX: ... on the development of a portfolio of wound management ... into agreements for investment commitments with Ironridge Global BioPharma ... in two transactions, subject to certain conditions, to purchase ...
... 15, 2011 VIVUS, Inc. (NASDAQ: VVUS ) ... agreement with officials of the Endocrine and Metabolic Division of ... for an early resubmission of the QNEXA New Drug Application ... to seek approval for an initial indication that includes obese ...
Cached Medicine Technology:ULURU Inc. Enters Into Strategic Financings of Up to $1.6 Million at a Premium to Current Share Price 2ULURU Inc. Enters Into Strategic Financings of Up to $1.6 Million at a Premium to Current Share Price 3VIVUS Provides Regulatory Update on QNEXA 2VIVUS Provides Regulatory Update on QNEXA 3VIVUS Provides Regulatory Update on QNEXA 4
... reference laboratory and a worldwide leader in ... an extensive test menu of highly complex ... anatomic pathology. Owned by the University of ... half of the nation's university teaching hospitals ...
... national reference laboratory and a worldwide leader ... offers an extensive test menu of highly ... and anatomic pathology. Owned by the University ... than half of the nation's university teaching ...
... a national reference laboratory and a worldwide ... ARUP offers an extensive test menu of ... clinical and anatomic pathology. Owned by the ... more than half of the nation's university ...
... reference laboratory and a worldwide leader in ... an extensive test menu of highly complex ... anatomic pathology. Owned by the University of ... half of the nation's university teaching hospitals ...
Medicine Products: