Navigation Links
Male Sex Chromosome on Its Way Out: Study
Date:7/17/2009

But researchers believe a replacement will take over

FRIDAY, July 17 (HealthDay News) -- Rapid evolution of the male sex chromosome could result in its disappearance within a few million years. But that won't mean the end of males, say U.S. scientists.

Penn State researchers found that the Y chromosome, carried only by males, has evolved at a much more rapid pace than the X chromosome, which is carried by both males and females. The rapid evolution of the Y chromosome has led to a dramatic loss of genes on the chromosome.

"Today, the human Y chromosome contains less than 200 genes, while the human X chromosome contains around 1,100 genes," Melissa Wilson, a graduate research fellow, said in a news release from Penn State.

"We know that a few of the genes on the Y chromosome are important, such as the ones involved in the formation of sperm, but we also know that most of the genes were not important for survival because they were lost, which led to the very different numbers of genes we observe between the once-identical X and Y. Although there is evidence that the Y chromosome is still degrading, some of the surviving genes on the Y chromosome may be essential, which can be inferred because these genes have been maintained for so long," Wilson explained.

"Even though some of the genes appear to be important, we still think there is a chance that the Y chromosome eventually could disappear," said team leader Kateryna Makova, an associate professor of biology. "If this happens, it won't be the end of males. Instead, a new pair of non-sex chromosomes likely will start on the path to becoming sex chromosomes."

The study appears in the July 17 issue of the journal PLoS Genetics.

The Penn State team plans to create a computer model to help them determine how long it will take for the Y chromosome to disappear. They'll also try to identify the processes causing the Y chromosome's deterioration.

More information

The U.S. National Library of Medicine has more about chromosomes.



-- Robert Preidt



SOURCE: Penn State, news release, July 16, 2009


'/>"/>
Copyright©2009 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Grant Supports Study of Abnormal Ring-Shaped Chromosomes
2. Optherion Licenses Worldwide Rights to Develop Age-Related Macular Degeneration Diagnostics Based on Chromosome 10 Genetic Variations
3. Herceptin helps women with multiple chromosomes containing HER2 gene, study finds
4. Chromosome Abnormalities Raise Risk for Autism
5. Missing Chromosome Improves Response to Brain Tumor Treatment
6. Penn researchers identify first sex chromosome gene involved in meiosis and male infertility
7. Research shines spotlight on a key player in the dance of chromosomes
8. Chromosome Linked to Diabetics Heart Risks
9. CSHL scientists discover link between control of chromosome duplication and segregation
10. Prescription Copay Assistance for Patients taking Gleevec or Tasigna for Philadelphia chromosome-positive Chronic Myelogenous Leukemia (Ph+ CML)
11. Immune cells from patients with rheumatoid arthritis have prematurely aged chromosomes
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Male Sex Chromosome on Its Way Out: Study
(Date:6/27/2016)... ... , ... TherapySites, the leading website and online ... Counseling Association. This new relationship allows TherapySites to continue to extend their ... benefits and promotional offers. , "TCA is extremely excited about this new partnership, ...
(Date:6/26/2016)... ... , ... On June 10-11, 2016, A Forever Recovery, a holistic treatment center ... Breakfast Table in Battle Creek, MI, where the rehabilitation facility is located. This annual ... the world’s leading providers of cereal and other breakfast foods. Its residents often refer ...
(Date:6/25/2016)... ... June 25, 2016 , ... Experts from the ... AcademyHealth’s Annual Research Meeting June 26-28, 2016, at the Hynes Convention Center in ... topics including advance care planning, healthcare costs and patient and family engagement. , ...
(Date:6/25/2016)... ... June 25, 2016 , ... As a lifelong Southern Californian, Dr. Omkar ... M.D from the David Geffen School of Medicine at UCLA. He trained in Internal ... complete his fellowship in hematology/oncology at the UCLA-Olive View-Cedars Sinai program where he had ...
(Date:6/24/2016)... ... June 24, 2016 , ... Those who have experienced traumatic events ... turn to unhealthy avenues, such as drug or alcohol abuse, as a coping mechanism. ... tools for healthy coping following a traumatic event. , Trauma sufferers tend to feel ...
Breaking Medicine News(10 mins):
(Date:6/26/2016)... , June 26, 2016 ... care operating models within the health care industry is ... financial efficiency , Deloitte offers a suite of ... business issues impacting efficient cost optimization: labor resource analysis, ... These services facilitate better outcomes and better economics ...
(Date:6/24/2016)... , June 24, 2016   Bay Area ... Network,s Dean Center for Tick Borne Illness ... and Rehabilitation, MIT Hacking Medicine, University of California, ... today announced the five finalists of Lyme ... disease.  More than 100 scientists, clinicians, researchers, entrepreneurs, ...
(Date:6/24/2016)... BEIJING , June 24, 2016 Dehaier ... or the "Company"), which develops, markets and sells medical ... China , signed a strategic cooperation agreement with ... as "Hongyuan Supply Chain") on June 20, 2016, to ... Under the strategic cooperation agreement, Dehaier will leverage Hongyuan ...
Breaking Medicine Technology: