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:


(Date:1/20/2016)... LONDON , Jan. 20, 2016 A ... positioned to directly benefit from the explosion in genomics ... from Howe Sound Research. A range of dynamic trends ... ...... - personalized medicine - pharmacogenomics - pathogen ... economies with large markets - greater understanding of the ...
(Date:1/20/2016)... SAN JOSE, Calif. , Jan. 20, 2016 ... leading developer of human interface solutions, today announced ... touch controller solution for wearables and small screen ... appliances such as printers. Supporting round and rectangular ... the S1423 offers excellent performance with moisture on ...
(Date:1/15/2016)... , Jan. 15, 2016 Recent publicized ... small to find new ways to ensure data security ... iOS and Android that ties ... biometrics, transforming it into a hardware authorization token. Customer ... swipe their fingerprint on their KodeKey enabled device to ...
Breaking Biology News(10 mins):
(Date:2/11/2016)... -- Wellcentive today announced it has been selected by FamilyCare ... community care organization (CCO) with more than 130,000 ... and care management solutions and services. Wellcentive,s capabilities ... managers, analysts and care managers while providing insight ... members. Oregon . ...
(Date:2/11/2016)... , Feb. 11, 2016  Dovetail Genomics™ LLC today ... beta program for a planned metagenomic genome assembly service. ... company,s metagenomic genome assembly method in a talk on ... Biology & Technology conference in Orlando, Fla. ... highly complex datasets is difficult. Using its proprietary ...
(Date:2/11/2016)... WASHINGTON , Feb. 11, 2016   BioInformant ... strategic report, "Stem Cell Research Products, Opportunities, Tools, and ... 2020. ... specialize in the stem cell industry, BioInformant has more ... of the stem cell market, by stem cell type. ...
(Date:2/11/2016)... ... February 11, 2016 , ... ... a new agreement with Bankok,Thailand-based Global Stem Cells Network (GSCN) to distribute exosome ... Latin American countries, including Mexico, Costa Rica, Dominican Republic, Colombia, Argentina, Nicaragua, Panama, ...
Breaking Biology Technology:
Cached News: