Navigation Links
Birds that make teeth

Gone does not necessarily mean forgotten, especially in biology. A recent finding by researchers at the University of Wisconsin, Madison, and colleagues from the University of Manchester have found new evidence that the ability to form previously lost organs--in this case, teeth--can be maintained millions of years after the last known ancestor possessed them.

Birds do not have teeth. However, their ancestors did--about 70?0 million years ago. The evolutionary loss of teeth corresponded to the formation of the beak that is present in all living birds. Nonetheless, it has been known that if mouse tooth-forming tissue is in contact with bird jaw tissue, the bird tissue is able to follow the instructions given by the mouse tissue and participate in making teeth, and that these teeth look very much like those of mammals. However, Drs. Matthew Harris and John F. Fallon and colleagues have found that modern birds retain the ability to make teeth even without instruction from their tooth-bearing cousins.

In the new work, the researchers show that the talpid2 strain of chicken harbors a genetic change that permits tooth formation in both the upper and lower jaw of embryonic birds. These teeth show similar developmental position as mammalian teeth and are associated with similar molecular instructions. Furthermore, when comparing the initial development of the structures, the researchers realized that the teeth forming in the chicken did not look like mammalian teeth, but resembled those of the alligator, the closest living relative of modern birds.

The findings strongly suggest that the birds were initiating developmental programs similar to those of their reptilian ancestors. In addition, the authors found that the capacity to form teeth still resides in normal chickens and can be triggered experimentally by molecular signals. Taken together, the new findings indicate that even though modern birds lost teeth millions of years ago, the potential to
'"/>

Source:Cell Press


Page: 1 2

Related biology news :

1. Birds brains reveal source of songs
2. Birds and bats sow tropical seeds
3. Birds going extinct faster due to human activities
4. Birds found to plan for the future
5. Nanospheres that block pain of sensitive teeth
6. Ultrasound may help regrow teeth
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Birds that make teeth

(Date:4/23/2014)... is a technique used to read quickly. It ... skipping non-essential words and/ or sentences. Similarly to ... to quickly "read" genetic information. Genes that need ... the smaller the encoding message, the easier it ... from Instituto Gulbenkian de Cincia (IGC, Portugal) and ...
(Date:4/22/2014)... 2014) -- There are all sorts of signaling strategies ... their colorful tails; satin bowbirds build specialized stick structures, ... objects; and European bitterling males show off bright nuptial ... unique method to communicate with others. , ... can have profound fitness implications for individuals that are ...
(Date:4/22/2014)... 22, 2014) Biotechnology scientists must be aware of ... and licensing guidelines, according to a new paper from ... in the current issue of the journal Regenerative ... 2013 U.S. Supreme Court ruling in the case Association ... occurring genes are unpatentable. The court case and rulings ...
Breaking Biology News(10 mins):Cell division speed influences gene architecture 2Best practices in communication for the animal world 2Best practices in communication for the animal world 3New patenting guidelines are needed for biotechnology 2New patenting guidelines are needed for biotechnology 3
... 2013 Medbox, Inc. (OTC Markets: MDBX) ( www.medboxinc.com ), ... the medical and retail industries, announced that their patented software ... means to meet the priorities spelled out by the US ... United States Attorneys titled, "Guidance Regarding Marijuana ...
... flatworms have the remarkable ability to regrow any missing body ... the molecular basis of regeneration. Over the ... differ depending on the severity of the injury they suffer. ... wound reacts at the cellular and molecular levels quite differently ...
... to the origin of species as "that mystery of mysteries," ... cannot fully explain how new animals and plants arise. ... based on the assumption that the main cause of the ... formation of barriers to reproduction between populations. Those barriers ...
Cached Biology News:Medbox's Marijuana Dispensing System Assists Operators in Complying with Federal Government's New Canna-Business Guidelines 2Medbox's Marijuana Dispensing System Assists Operators in Complying with Federal Government's New Canna-Business Guidelines 3Tissue loss triggers regeneration in planarian flatworms 2Long-held assumption about emergence of new species questioned 2Long-held assumption about emergence of new species questioned 3
(Date:1/15/2014)... TAIPEI , Jan. 15, 2014 TaiGen Biotechnology ... an exclusive agreement with R-Pharm, a leading Russian pharmaceutical ... in the Russian Federation , ... Commonwealth Independent States (CIS). Nemonoxacin is a novel antibiotic for ...
(Date:1/14/2014)... 14, 2014 Carahsoft and CDS Federal ... 23, 2014 at 2pm EST (11am PST), “Natural Language ... focuses on how technology can turn raw, heterogeneous data ... government agencies. The online webinar will last approximately one ...
(Date:1/14/2014)... 2014  3D Communications, a leading provider of strategic communications services to ... events in the United States and ... Cox , JD, is returning to the firm,s Washington, ... 3D after more than two years of service as Associate Commissioner ...
(Date:1/14/2014)... January 14, 2014 EquitiesIQ, a leading ... (OTCQB: ALQA). Alliqua is an emerging biomedical company acquiring, ... wound care market. , Free report download: http://equitiesiq.com/reports/alliqua/ ... a seasoned management team and Board, which launched the ...
Breaking Biology Technology:TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 2TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 4Webcast - Natural Language Processing: Converting Raw Data into Actionable Knowledge – Hosted by Carahsoft and CDS Federal Services 2Former FDA Associate Commissioner Returns To 3D Communications 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3
... England, February 14 Executives from Senexis,and O2H, ... under which,O2H will provide synthetic and computational chemistry ... an FTE basis., "We believe our collaboration ... and will benefit our search for new,therapeutics to ...
... Feb. 14 AspenBio Pharma,Inc. (Nasdaq: APPY ) ... drugs and diagnostics for animals and humans, has been,invited ... Growth Stock,Conference. The conference will be held February 18-21, ... California., Roth Capital Partners Stock Conferences are one ...
... Onyx,Pharmaceuticals, Inc. (Nasdaq: ONXX ) today announced that ... quarter and full year 2007,financial results and provide a ... Eastern Time (2:00 p.m. Pacific Time). Financial results,for the ... be released,earlier that day., Interested parties may access ...
Cached Biology Technology:Senexis and O2H (Oxygen Healthcare) Announce Medicinal Chemistry Collaboration 2AspenBio Pharma to Present at the Roth Capital Partners 20th Annual Growth Stock Conference 2Onyx Pharmaceuticals Announces Fourth Quarter and Full Year 2007 Financial Results Teleconference and Webcast 2
Vented Caps for 75 cm2 Flasks...
BD BioCoat Poly-D-Lysine 60 mm Culture Dishes, tissue-culture treated polystyrene with a uniform application of poly-D-lysine....
BD BioCoat Laminin 60 mm Culture Dishes, tissue-culture treated polystyrene with a uniform application of mouse laminin....
... Ciphergens ProteinChip System, Series 4000 incorporates ... clinical researchers and biologists in biomarker research. ... the fastest route for converting biomarker discoveries ... platform. The Series 4000 is designed to ...
Biology Products: