HOME >> BIOLOGY >> NEWS
Evolution reveals an independent route for diversity in animal form

Researchers have found that Cnidaria, a group of marine animals noted for diverse morphology among its constituent species, actually lacks the ancient "Hox" gene system that is essential for the development of most other animals. The finding is surprising because the Hox system is largely responsible for so-called axial patterning, the developmental process that directs the formation of different morphological features along the anterior-posterior axis--the axis along which the head, trunk, and tail are arranged. The work indicates that despite the importance of the Hox system in the development of most animals, the evolution of a typical Hox system is not in fact a prerequisite for axial patterning during development or for the generation of diverse animal morphology.

The findings are reported in the May 9th issue of Current Biology by scientists Bernd Schierwater, Kai Kamm, and Wolfgang Jakob of Tierrztliche Hochschule Hannover, in Germany, Stephen Dellaporta of Yale University, and David Miller of James Cook University in Australia.

A remarkable feature of Hox-system genes is that they are typically clustered in groups along chromosomes, with their order along the chromosome reflecting their actual pattern of expression along the anterior-posterior axis of a developing animal. The Hox system has long been considered a defining characteristic of animals, and much of the variation seen in animal morphology has been attributed to evolutionary variations on how the Hox system is implemented during development in different species.

In the new work, the researchers investigated the Hox status of cnidarians--a group of primitive animals that diverged very early on in animal evolution from the lineage leading to most other animal species. Cnidarians include reef-building polyps and pelagic jellyfish, while the group from which it split--the Bilateria--has given rise to the vast majority of the animals we are familiar with, including worms, fish,
'"/>

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


Page: 1 2

Related biology news :

1. Evolution is driven by gene regulation
2. Evolutionary relevance of retinoic acid-induced craniofacial malformations
3. Evolution of animal personalities
4. Evolution of symbiosis
5. Evolutionary Medicine Meeting will advance a new scientific discipline
6. Evolutionary influences on proteins
7. The Evolution of Altruism
8. Phyloinformatics Hackathon at the National Evolutionary Synthesis Center
9. Evolution and the workaround
10. Dont move a muscle: Evolutionary insight into myogenesis
11. Evolution of influenza A virus

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Evolution reveals independent route for diversity animal form

(Date:11/21/2014)... , Nov. 20, 2014   Atmel® Corporation ... in microcontroller (MCU) and touch technology solutions, today launched ... sensors with the widest V cc range ... temperature accuracy and faster I 2 C bus communication ... serial EEPROM memory making them ideal for consumer, industrial, ...
(Date:11/18/2014)... 2014   EyeLock Inc. , a market ... MorphoTrust USA (Safran), a leading U.S. provider ... strategic partnership to offer comprehensive biometric identity solutions ... airport screening and financial services markets. ... consumers through a nationwide network of 1,100 IdentoGO® ...
(Date:11/10/2014)... began appearing on U.S. store shelves in early 2010, ... since. The small packets can be tossed into a ... liquid or powder. The convenience, though, has come with ... researchers at Nationwide Children,s Hospital found that from 2012 ... 17,230 children younger than 6 years of age swallowing, ...
Breaking Biology News(10 mins):Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 2Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 3Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 4EyeLock, MorphoTrust Form Strategic Partnership to Pursue Commercial Enterprise Deployments 2EyeLock, MorphoTrust Form Strategic Partnership to Pursue Commercial Enterprise Deployments 3Study finds laundry detergent pods, serious poisoning risk for children 2
(Date:11/24/2014)... Baltimore, MD (PRWEB) November 24, 2014 ... recruiting underrepresented patient populations into clinical trials at ... Maryland. , “Continental was created with the ... trials play a fundamental role in medical advances," ... the Tuskegee syphilis experiment to the immortal cell ...
(Date:11/24/2014)... Senior Vice President, General Manager for Clinical ... acumen Elsevier , a world-leading provider ... congratulates Diane Bartoli , Senior Vice President and ... Solutions, for being recognized in the 13 th ... Profiles in Diversity Journal ® . ...
(Date:11/22/2014)... Boston, MA (PRWEB) November 21, 2014 ... and key investors will gather on December 3rd ... Boston Biotech Conferences series. GeneticRx will take place ... Harvard Medical School and will discuss the present ... gene therapy, exon skipping, and gene editing—as well ...
(Date:11/22/2014)... 2014 The “Chiral Chromatography Columns ... Material (Metal, Glass, Plastic), by Application [GC, LC ... Forecast to 2018” analyses and studies the major ... America, Europe, Asia, and Rest of the World. ... figures spread through 135 pages and in-depth TOC ...
Breaking Biology Technology:At Continental Clinical Solutions, CEO Saleh Stevens Focuses on Diversity in Clinical Trial Recruitment at Maryland Site 2At Continental Clinical Solutions, CEO Saleh Stevens Focuses on Diversity in Clinical Trial Recruitment at Maryland Site 3Elsevier Clinical Solutions' Diane Bartoli Featured In Profiles in Diversity Journal's 13th Annual Women Worth Watching Issue 2Elsevier Clinical Solutions' Diane Bartoli Featured In Profiles in Diversity Journal's 13th Annual Women Worth Watching Issue 3Pioneering Academics and Key Industry Leaders to Discuss Rare Diseases and the Emergence of New Genetic Medicines at Genetic Rx on December 3rd 2Chiral Chromatography Columns Market worth $87.8 Million by 2018 - New Research Report by MarketsandMarkets 2Chiral Chromatography Columns Market worth $87.8 Million by 2018 - New Research Report by MarketsandMarkets 3Chiral Chromatography Columns Market worth $87.8 Million by 2018 - New Research Report by MarketsandMarkets 4Chiral Chromatography Columns Market worth $87.8 Million by 2018 - New Research Report by MarketsandMarkets 5
Cached News: