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:7/31/2014)... prestin was found to be a key gene responsible for ... the hair cells of the inner ear that contracts and ... an antique phonograph horn, amplify sound waves to make hearing ... in the advanced online edition of Molecular Biology and ... has also independently evolved to play a critical role in ...
(Date:7/31/2014)... has long been known that biomass burning ... as a ritual , slash-and-burn agriculture and wildfires ... health. , But until the release of a ... Engineering Professor Mark Z. Jacobson, the degree of ... Jacobson,s research, detailed in a paper published July ...
(Date:7/31/2014)... team of scientists from Spain, France, and the ... that is the oldest definitive member of the ... amber. The discovery and description were made possible ... synchrotron imaging technique, which allows the detailed study ... new species is described in the journal ...
Breaking Biology News(10 mins):Stanford professor finds that wildfires and other burns play bigger role in climate change 2Stanford professor finds that wildfires and other burns play bigger role in climate change 3Stanford professor finds that wildfires and other burns play bigger role in climate change 4
(Date:8/1/2014)... (PRWEB) August 01, 2014 Testing ... led to a better understanding embryonic development. ... reorganize into structurally and functionally distinct tissues is ... defects. Prof. Todd McDevitt, Melissa Kinney, and ... signals interact with biochemical cues to control many ...
(Date:7/31/2014)... people over 60 are not donor candidates for bone ... time, making the elderly prone to life-threatening infection and ... now has discovered a reason why. , "We have ... blood-forming cells to maintain blood production over time in ... could be restored for rejuvenation therapies," said Emmanuelle Passegu, ...
(Date:7/31/2014)... , July 31, 2014 The SNIS ... with $25,000 to fund a translational research project.  ... 2011, the gift was presented at the Society ... Meeting in Colorado Springs, CO. ... neurointerventional approaches to neurovascular conditions, SNIS formed the ...
(Date:7/31/2014)... , July 31, 2014 ... Market Research "Electrodes for Medical Devices Market (Diagnostic Electrodes ... Therapeutic Electrodes - TENS, Pacemakers, Defibrillators, Electrosurgical and Other ... and Forecast, 2013 - 2019," the global electrodes market ... in 2012 and is estimated to reach a market ...
Breaking Biology Technology:Study Links Biomechanics and Gene Expression in Stem Cells 2Key to aging immune system is discovered 2SNIS Foundation Bestows First Grant Award For Cutting-Edge NeuroInterventional Research 2SNIS Foundation Bestows First Grant Award For Cutting-Edge NeuroInterventional Research 3Electrodes for Medical Devices Market Expected to Reach USD 1.45 Billion Globally in 2019: Transparency Market Research 2Electrodes for Medical Devices Market Expected to Reach USD 1.45 Billion Globally in 2019: Transparency Market Research 3Electrodes for Medical Devices Market Expected to Reach USD 1.45 Billion Globally in 2019: Transparency Market Research 4Electrodes for Medical Devices Market Expected to Reach USD 1.45 Billion Globally in 2019: Transparency Market Research 5Electrodes for Medical Devices Market Expected to Reach USD 1.45 Billion Globally in 2019: Transparency Market Research 6
Cached News: