News tagged with chromosome evolution
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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Men might not 'become extinct' after all: Theory of the 'rotting' Y chromosome dealt a fatal blow
(PhysOrg.com) -- If you were to discover that a fundamental component of human biology has survived virtually intact for the past 25 million years, you'd be quite confident in saying that it is here to stay.
Feb 22, 2012 |
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Stress-induced genomic instability facilitates rapid cellular adaption in yeast
Cells trying to keep pace with constantly changing environmental conditions need to strike a fine balance between maintaining their genomic integrity and allowing enough genetic flexibility to adapt to inhospitable conditions. ...
Jan 29, 2012 |
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Chromosomal 'breakpoints' linked to canine cancer
North Carolina State University researchers have uncovered evidence that evolutionary "breakpoints" on canine chromosomes are also associated with canine cancer. Mapping these "fragile" regions in dogs may also have implications ...
Nov 03, 2011 |
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When plants go polyploid
(PhysOrg.com) -- Plant lineages with multiple copies of their genetic information face higher extinction rates than their relatives, researchers report in Science magazine.
Sep 13, 2011 |
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'Hidden' differences of chromosome organization become visible
Why different species have dissimilar sets of chromosomes? Why the differentiated species often conserve apparently identical chromosome complements? Furthermore, why, while chromosome rearrangements can considerably ...
Aug 25, 2011 |
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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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Discovering the bigger picture in chromosomes
By mapping various genomes onto an X-Y axis, a team comprised mostly of Kansas State University researchers has found that Charles Darwin and a fruit fly -- among other organisms -- have a lot in common genetically.
Jul 06, 2011 |
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New plant species gives insights into evolution
A new University of Florida study shows when two flowering plants are crossed to produce a new hybrid, the new species' genes are reset, allowing for greater genetic variation.
Mar 17, 2011 |
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Biologists find genetic explanation for evolutionary change: Location
A gene's location on a chromosome plays a significant role in shaping how an organism's traits vary and evolve, according to findings by genome biologists at New York University's Center for Genomic and Systems Biology and ...
Oct 14, 2010 |
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Model explains rapid transition toward division of labor in biological evolution
The transition from colonies of individual cells to multicellular organisms can be achieved relatively rapidly, within one million generations, according to a new mathematical model, published June 10 in the open-access journal ...
Jun 10, 2010 |
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Scientists suggest certain genes boost chances for distributing variety of traits, drive evolution
Genes that don't themselves directly affect the inherited characteristics of an organism but leave them increasingly open to variation may be a significant driving force of evolution, say two Johns Hopkins scientists.
Dec 14, 2009 |
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Genome duplication responsible for more plant species than previously thought
Extra genomes appear, on average, to offer no benefit or disadvantage to plants, but still play a key role in the origin of new species, say scientists from Indiana University Bloomington and three other institutions ...
Aug 12, 2009 |
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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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New finding about the bane of parents' lives -- head lice
(PhysOrg.com) -- Head lice are a challenge for parents of primary-school aged children all around the world, including Australia.
Biology /
Jan 27, 2009 |
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