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:4/28/2017)... Linda, Ca (PRWEB) , ... April 28, 2017 ... ... with cardiac or hERG liability could substantially improve drug safety and minimize the ... be provided for validating ion channel inhibition using cell lines and for cardiac ...
(Date:4/28/2017)... FL (PRWEB) , ... April 28, 2017 , ... ... Florida are conducting a pilot study of ActiGraph’s CentrePoint Data Hub ... is a leading provider of clinical-grade wearable activity and sleep monitoring solutions for ...
(Date:4/28/2017)... ... , ... NuevaCare, a leading home care agency based in San Mateo, California, ... proud to announce information upgrades to its blog in the form of WordPress tags. ... such as home care (generally) as well as senior care and home care agency ...
(Date:4/27/2017)... ... April 27, 2017 , ... ... respiratory hospital, based in Denver, Colorado, announced an agreement to create the Jane ... continuing support of the Jane and Leonard Korman Family Foundation. The collaboration leverages ...
(Date:4/27/2017)... (PRWEB) , ... April 27, 2017 , ... ... her husband Dan Gasby the 2017 Public Leadership in Neurology Award (PLINA). The ... retired professional athlete Tedy Bruschi, Vice President Walter Mondale, actor Michael J. Fox ...
Breaking Medicine News(10 mins):
(Date:4/19/2017)... NEW YORK , April 19, 2017 /PRNewswire/ ... This report on the prostate cancer ... of the global market. Increasing prevalence of prostate ... as innovation in the development of new drugs ... hormone-refractory prostate cancer drug due to lesser side ...
(Date:4/19/2017)... PUNE, India , April 19, 2017 ... Type and Application, Forecast to 2022 report has covered and ... provides statistics and information on market size, shares and growth ... with major drivers, challenges and opportunities in the global market. ... Browse 152 Tables and ...
(Date:4/19/2017)... , April 19, 2017 ... stimulate an immune response in pets such as ... products are of various types such as Attenuated ... Toxoid Vaccines, DNA Vaccines and Recombinant Vaccines. Attenuated ... as virus or bacteria, which have been weakend ...
Breaking Medicine Technology: