News tagged with sex chromosomes
Worms can evolve to survive intersex populations
(PhysOrg.com) -- Sexually reproducing species need at least two sexes in order to produce offspring, but there are many ways that nature produces different sexes. Many animals (including humans and other mammals) ...
Dec 06, 2011 |
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Testosterone concentrations in men affected by genetic makeup
Genetics play an important role in the variation in, and risk of, low testosterone concentrations in men. A study by the CHARGE Sex Hormone Consortium, published in the open-access journal PLoS Genetics on Thursday, 6th Oc ...
Oct 06, 2011 |
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New genetic region responsible for testicle development found
New research presented today at the European Society for Paediatric Endocrinology meeting has found a genetic region, which may control testicle development in the foetus.
Sep 26, 2011 |
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New thinking on regulation of sex chromosomes in fruit flies
Fruit flies have been indispensible to our understanding of genetics and biological processes in all animals, including humans. Yet, despite being one of the most studied of animals, scientists are still finding the fruit ...
Sep 19, 2011 |
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First German genome comprehensively resolved at its molecular level
Max Planck researchers analyze the two chromosome sets in the human genome separately for the first time.
Sep 12, 2011 |
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B chromosomes affect sex determination in cichlid fishes
B chromosomes have a functional effect on sex determination in a species of cichlid fishes from Lake Victoria, according to a study by Japanese researchers to be published in open-access journal PLoS Genetics on August 18th, ...
Aug 18, 2011 |
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Researchers discover gene required to maintain male sex throughout life
University of Minnesota Medical School and College of Biological Sciences researchers have made a key discovery showing that male sex must be maintained throughout life.
Jul 20, 2011 |
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Genomic archeology reveals early evolution of sex chromosomes
A team from Uppsala University, Uppsala, Sweden, is using genomics to shed light on the early evolutionary history of sex chromosomes. The research is published in the April 2011 Eukaryotic Cell.
May 17, 2011 |
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Sex and the single chromosome
Is there value to sex? For higher organisms, absolutely. Animals, plants and fungi that reproduce only by cloning are scarce as hen's teeth, suggesting the gene shuffling of sex pays handsome dividends.
Nov 26, 2010 |
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Sex differences determined not simply by gender
(PhysOrg.com) -- Researchers at Imperial College London have uncovered an inherent difference in the way the genes of males or females can be "switched off" or silenced in the body's developing immune system. This finding ...
Sep 16, 2010 |
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Researchers Use New Sequencing Strategies To Discover Rare Inherited Illness Rapidly
(PhysOrg.com) -- A team of researchers from the National Human Genome Research Institute (NHGRI) has demonstrated a new technical strategy that promises to rapidly determine the genetic cause for very rare inherited illnesses. ...
May 07, 2010 |
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New research about human genetic diseases and human development
The density of transposable (jumping) elements between sex chromosomes in primates may have important consequences for the studies of human genetic diseases, say Penn State University researchers.
Apr 29, 2010 |
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Rainfall linked to skewed sex ratios
An increased proportion of male African buffalo are born during the rainy season. Researchers writing in the open access journal BMC Evolutionary Biology collected data from over 200 calves and 3000 foetuses, finding that r ...
Apr 22, 2010 |
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Unusual sex chromosome creates third sex in Hessian flies
(PhysOrg.com) -- Expectant human parents might wish for a boy or girl, but Hessian flies actually have a third option, and, no matter what, the flies are never surprised by the sex of their offspring.
Mar 30, 2010 |
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Female sex chromosomes, not just hormones, help regulate blood pressure
Researchers at Georgetown University Medical Center (GUMC) have determined that something in female sex chromosomes appears to trigger a rise in blood pressure after the onset of menopause. This finding challenges the current ...
Mar 15, 2010 |
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Sex-determination system
A sex-determination system is a biological system that determines the development of sexual characteristics in an organism. Most sexual organisms have two sexes. In many cases, sex determination is genetic: males and females have different alleles or even different genes that specify their sexual morphology. In animals, this is often accompanied by chromosomal differences. In other cases, sex is determined by environmental variables (such as temperature) or social variables (the size of an organism relative to other members of its population). The details of some sex-determination systems are not yet fully understood.
For more information about Sex-determination system, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
