News tagged with x chromosome
Adam's rib, revisited: Evolutionary divergence of mammalian sex chromosomes
(Phys.org) -- Males and females... Mars and Venus... XY and XX chromosomes -- all are common memes. At the same time, the evolution of therian (placental and marsupial) sex chromosomes is less widely understood. ...
Apr 18, 2012 |
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Scientists show how men amp up their X chromosome
What makes a man? His clothes? His car? His choice of scotch? The real answer, says Brown University biologist Erica Larschan, is the newly understood activity of a protein complex that, like a genetic power tool, gives enzymes ...
Mar 02, 2011 |
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Grandparents favor genetically close grandchildren
(PhysOrg.com) -- New research suggests that grandparents naturally and subconsciously favor the grandchildren who are most closely related to them genetically. The phenomenon is called "sexually antagonistic ...
Apr 29, 2010 |
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The story of X -- evolution of a sex chromosome
(PhysOrg.com) -- Move over, Y chromosome - it's time X got some attention. In the first evolutionary study of the chromosome associated with being female, University of California, Berkeley, biologist Doris ...
Apr 16, 2009 |
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Genetic mutations that boost individual's adaptability have greater chances of getting through to X chromosomes
One of the most important questions for evolution researchers is how a species develops and adapts during the course of time. An analysis of the genes of twelve chimpanzees has now demonstrated that the chimpanzee X chromosome ...
Jan 30, 2012 |
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Induced pluripotent stem cell retain an inactivated X chromosome
Female induced pluripotent stem (iPS) cells, reprogrammed from human skin cells into cells that have the embryonic-like potential to become any cell in the body, retain an inactive X chromosome, stem cell researchers at UCLA ...
Medicine & Health / Medical research
Sep 03, 2010 |
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Male sex chromosome losing genes by rapid evolution, study reveals
Scientists have long suspected that the sex chromosome that only males carry is deteriorating and could disappear entirely within a few million years, but until now, no one has understood the evolutionary ...
Jul 17, 2009 |
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Sex Talk Revelations of the Lonely Y Chromosome
(PhysOrg.com) -- In the week that the University of Leicester celebrates the 25th anniversary of the discovery of DNA fingerprinting (Thursday September 10) new findings from the world-renowned University of Leicester Department ...
Sep 09, 2009 |
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Genetic research confirms that non-Africans are part Neanderthal
Some of the human X chromosome originates from Neanderthals and is found exclusively in people outside Africa, according to an international team of researchers led by Damian Labuda of the Department of Pediatrics at the ...
Other Sciences / Archaeology & Fossils
Jul 18, 2011 |
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Genetic conflict in fish led to evolution of new sex chromosomes
University of Maryland biologists have genetically mapped the sex chromosomes of several species of cichlid (pronounced "sick-lid") fish from Lake Malawi, East Africa, and identified a mechanism by which new ...
Oct 01, 2009 |
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Nine new X chromosome genes associated with learning disabilities
(PhysOrg.com) -- A collaboration between more than 70 researchers across the globe has uncovered nine new genes on the X chromosome that, when knocked-out, lead to learning disabilities. The international ...
Apr 19, 2009 |
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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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In praise of the Y chromosome
(PhysOrg.com) -- David Page, director of the Whitehead Institute and professor of biology at Massachusetts Institute of Technology, says research indicates the much-maligned Y chromosome plays a more critical ...
Apr 20, 2010 |
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What makes a cow a cow? Complete bovine genome sequenced
Researchers report today in the journal Science that they have sequenced the bovine genome, for the first time revealing the genetic features that distinguish cattle from humans and other mammals.
Apr 23, 2009 |
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Reproductive scientists create mice from 2 fathers
Using stem cell technology, reproductive scientists in Texas, led by Dr. Richard R. Berhringer at the M.D. Anderson Cancer Center, have produced male and female mice from two fathers.
Dec 08, 2010 |
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X chromosome
The X chromosome is one of the two sex-determining chromosomes in many animal species, including mammals (the other is the Y chromosome). It is a part of the XY sex-determination system and X0 sex-determination system. The X chromosome was named for its unique properties by early researchers, and this resulted in its counterpart being named the Y chromosome for the next letter in the alphabet when it was discovered later.
For more information about X chromosome, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
