Navigation Links
Researchers trace evolution to relatively simple genetic changes

In a stunning example of evolution at work, scientists have now found that changes in a single gene can produce major changes in the skeletal armor of fish living in the wild.

The surprising results, announced in the March 25, 2005, issue of journal Science, bring new data to long-standing debates about how evolution occurs in natural habitats.

"Our motivation is to try to understand how new animal types evolve in nature," said molecular geneticist David M. Kingsley, a Howard Hughes Medical Institute investigator at the Stanford University School of Medicine. "People have been interested in whether a few genes are involved, or whether changes in many different genes are required to produce major changes in wild populations."

The answer, based on new research, is that evolution can occur quickly, with just a few genes changing slightly, allowing newcomers to adapt and populate new and different environments.

In collaboration with zoologist Dolph Schluter, at the University of British Columbia, Vancouver, Canada, and Rick Myers and colleagues at Stanford, Kingsley and graduate student Pamela F. Colosimo focused on a well-studied little fish called the stickleback. The fish -- with three bony spines poking up from their backs -- live both in the seas and in coastal fresh water habitats all around the northern hemisphere.

Sticklebacks are enormously varied, so much so that in the 19th century naturalists had counted about 50 different species. But since then, biologists have realized most populations are recent descendants of marine sticklebacks. Marine fish colonized new freshwater lakes and streams when the last ice age ended 10,000 to 15,000 years ago. Then they evolved along separate paths, each adapting to the unique environments created by large scale climate change.

"There are really dramatic morphological and physiological adaptations" to the new environments, Kingsley said.

For example, "sticklebacks vary i
'"/>

Source:Howard Hughes Medical Institute


Page: 1 2 3 4 5

Related biology news :

1. Researchers discover way to make cells in the eye sensitive to light
2. Researchers find how protein allows insects to detect and respond to pheromones
3. Researchers Uncover Key Step In Manufacture of Memory Protein
4. Researchers reveal the infectious impact of salmon farms on wild salmon
5. Researchers identify target for cancer drugs
6. Researchers discover molecule that causes secondary stroke
7. Researchers find missing genes of ancient organism
8. Researchers add new tool to tumor-treatment arsenal
9. UF Researchers Map Bacterial Proteins That Cause Tooth Loss
10. VCU Researchers Identify Networks Of Genes Responding To Alcohol In The Brain
11. Researchers develop rapid diagnostic tool for pathogen identification
Post Your Comments:
(Date:9/30/2014)... each year, but its deep-blue waters host the ... alien species, including fish, crustaceans, and algae are ... In the open-access journal Frontiers in Marine ... data from a new information system developed by ... of alien species has changed the native biodiversity ...
(Date:9/30/2014)... comprehensive assessment conducted by the Ocean Health Index ... 100 in overall health. In addition, for the ... the 15 ocean regions beyond national jurisdiction (high-seas ... healthy climate, safeguarding biodiversity and providing sustainable food ... the index, a partnership led by scientists from ...
(Date:9/30/2014)... a Salk professor and Howard Hughes Medical Institute ... been named recipients in the 2014 round of ... through the BRAIN (Brain Research through Advancing Innovative ... grant, announced September 30, provides more than $3 ... three years. , The BRAIN Initiative, launched last ...
Breaking Biology News(10 mins):Biodiversity in the Mediterranean is threatened by alien species 2Rating the planet's oceans 2Rating the planet's oceans 3Salk scientists receive $3 million for BRAIN Initiative grant 2
... 2012 A paper to be published on January 3, ... by NHM entomologist Dr. Brian Brown, reveals a new threat ... bees, well-publicized Colony Collapse Disorder (CCD), a syndrome characterized by ... but dangerous phorid fly, which may pose an emerging threat ...
... Unique E. coli Protein May Be Not After ... unique mechanism for utilizing iron may not be after all. ... Genomes, the University of Oklahoma and the University of Utah School ... online journal mBio . The ability to acquire iron ...
... Hydrogen sulfide, a gas notorious for its rotten-egg smell, may ... of scarring proteins in kidney cells, researchers from The University ... Journal of Biological Chemistry. The paper is scheduled ... manufacture of scarring proteins , "There is interest in ...
Cached Biology News:NHM entomologist co-authors new research on parasitic phorid fly, a new threat to honey bees 2News tips from the journal mBio 2News tips from the journal mBio 3Hydrogen sulfide reduces glucose-induced injury in kidney cells 2
(Date:10/1/2014)... The U.S. Department of Labor has awarded ... as part of the Trade Adjustment Assistance Community College ... by the Department of Labor and Department of Education. ... E. Perez and Secretary of Education Arne Duncan announced ... to nearly 270 colleges across the country. , ...
(Date:9/30/2014)... . , The researchers ... semiconductor layer. Quantum dots are small structures that spontaneously emit ... laser pulse is fired at the photonic crystal, its refractive ... in the electromagnetic field around it. This change can speed ... dot. As soon as the refractive index recovers its usual ...
(Date:9/30/2014)... Mass. Using a bio-mimicking analog of one ... grass, an international research team led by Alejandro ... taken a major step in developing long-sought polymer ... electricity for use in electronic devices. , ... Amherst and others at Stanford University and Dresden ...
(Date:9/30/2014)... (PRWEB) September 30, 2014 Shimadzu ... extensometer, an easy-to-use and highly precise tool for ... with considerable elongation. With 1000-mm maximum movement distance, ... percent for a gauge length of 10 mm. ... measurement accuracy above 50-mm stroke and within +/- ...
Breaking Biology Technology:U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 2U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 3U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 4Ultrafast remote switching of light emission 2Blades of grass inspire advance in organic solar cells 2Blades of grass inspire advance in organic solar cells 3Shimadzu’s New Long-Travel Extensometer Increases Precision for Soft Material Testing 2
... plans to give $120,000 worth of server support a ... run by former Wisconsin governor Scott McCallum. , ,McCallum ... release that the support would help Aidmatrix deal with ... responding to, including the series of hurricanes that hit ...
... five states with headquarters in Madison, said it has agreed ... Minnesota. , ,In exchange for acquiring most of the customers ... hand over Fargo and Grand Forks in North Dakota, and ... federal and state approval, the deal is expected to close ...
... was ranked 51st in the nation, 80th in the ... the London Financial Times this week. It didn't make ... on alumni careers and salary, diversity, and research capabilities. ... and a survey of students enrolled between 2000 and ...
Cached Biology Technology:
... cDNA Library Panels were designed for full-length ... of PCRs to identify the desired cDNA ... in a 96-well "Master Plate," where each ... Having identified the positive well(s) by gel ...
... cDNA Library Panels were designed for full-length ... of PCRs to identify the desired cDNA ... in a 96-well "Master Plate," where each ... Having identified the positive well(s) by gel ...
... 435 is an affordable, compact benchtop ... slides, providing a broad array of ... acquires high-resolution images with high-performance laser ... excitation and emission filter changers, and ...
... Contents include: Microarray hybridization chamber ... chamber top, clamp, thumbscrew) Microarray chamber user ... and are intended to be cleaned and ... with Agilents Catalog Oligo Microarray kits and ...
Biology Products: