HOME >> BIOLOGY >> NEWS
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 7080 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 form
'"/>

Contact: Heidi Hardman
hhardman@cell.com
617-397-2879
Cell Press
21-Feb-2006


Page: 1 2

Related biology news :

1. Birds take cues from their competitors
2. Wanting ahead -- Birds plan for future desires
3. Birds plan for future meals
4. Birds found to plan for the future
5. Birds going extinct faster due to human activities
6. Birdsong sounds sweeter because throats filter out messy overtones
7. Birds and bats sow tropical seeds
8. Birds that sing with their wings to woo
9. Birds, butterflies, bacteria same law of biology appears to apply
10. Making new teeth
11. Root beer may be safest soft drink for teeth

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/9/2019)... ... 2019 , ... Murrieta Genomics , the genomic sequencing business incubator, is ... University of California Riverside’s EPIC SBDC focused on research funding by U.S. Small Business ... March 17, 2019. The location is the Highlander Union Building, Room 302 South on ...
(Date:3/9/2019)... ... March 08, 2019 , ... On International Women’s ... new initiative focused on women in the field. The Women in Cancer ... to celebrate and empower emerging female leaders in the cancer immunotherapy field. , ...
(Date:3/5/2019)... ... March 05, 2019 , ... Join this live ... metadata-driven approach will help data analysts and bioinformaticians focus on data analysis without worrying ... that can come from different source systems. Some sources of data include:, ...
Breaking Biology News(10 mins):
(Date:3/19/2019)... (PRWEB) , ... March 19, 2019 , ... Bogey was nine years old when he ... in his left hip. These ailments caused Bogey to experience problems with his mobility. ... up stairs, and onto his special spot on the couch. , His owners, devastated at ...
(Date:3/19/2019)... ... ... free webinar will review strategies for data management in modular and adaptive clinical ... times by up to 30 percent, reducing cost while increasing quality, achieving clinical site set-up ... to migrate data – reducing risk and impact on trial success, trial teams, and trial ...
(Date:3/19/2019)... ... March 19, 2019 , ... ... cloud solutions, today announced it has begun offering NVIDIA® DGX-1™ deep learning systems ... utilize DGX-1, designed to provide the highest performance for artificial intelligence and deep ...
(Date:3/15/2019)... ... March 15, 2019 , ... ... in American Process Inc. and affiliate companies including AVAPCO LLC and API ... Michigan, the Thomaston Biorefinery and R&D center in Thomaston, Georgia, operations, research, ...
Breaking Biology Technology:
Cached News: