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:8/24/2015)... TOWN, South Africa , August 24, 2015 ... Germany ,s largest biometrics manufacturer DERMALOG and ... with the "2015 African Biometrics Company of the Year ... in Nigeria .   -Cross ... and http://www.presseportal.de/nr/8896 - On Thursday evening, ...
(Date:8/20/2015)... , Aug. 20, 2015   Sensory, ... on improving the user experience and security of ... technologies, today announced that its TrulySecure™ ... authentication software to be FIDO Certified™. ... for compliance with the FIDO UAF (Universal Authentication ...
(Date:8/18/2015)... 2015  Navitas today announced that it ... Submission Content Management webinar scheduled on August ... to the Implementation of Regulatory Submission Standards ... industry, vendors, health authorities, consultants and the ... a standard method of implementing electronic submission ...
Breaking Biology News(10 mins):Frost & Sullivan Honors DERMALOG with Biometrics Prize for Achievements in Africa 2Frost & Sullivan Honors DERMALOG with Biometrics Prize for Achievements in Africa 3TrulySecure From Sensory Becomes First Face and Voice Biometrics Technology to be FIDO UAF Certified 2TrulySecure From Sensory Becomes First Face and Voice Biometrics Technology to be FIDO UAF Certified 3TrulySecure From Sensory Becomes First Face and Voice Biometrics Technology to be FIDO UAF Certified 4TrulySecure From Sensory Becomes First Face and Voice Biometrics Technology to be FIDO UAF Certified 5Navitas, a Key Contributor in IRISS Forum Webinar 2Navitas, a Key Contributor in IRISS Forum Webinar 3
(Date:8/27/2015)... , Aug. 27, 2015 In response ... FedEx, UPS and The US Postal Service to ... classified as ,select agents, by the CDC, Marken ... handling these sensitive shipments. Marken uses ... regulations, trained and certified personnel to ensure the ...
(Date:8/26/2015)... ... 26, 2015 , ... MediVet Biologics, a leader in Veterinary ... to open in Manhattan, Kansas in early October, 2015. The location of the ... and development through collaboration with researchers from Kansas State University’s College of Veterinary ...
(Date:8/26/2015)... N.J. , Aug. 26, 2015  Roka Bioscience, ... focused on providing advanced testing solutions for the detection ... CEO will present at the Sidoti & Company Emerging ... conference will be held at the New York Marriott ... presentation will be available through the investor relations section ...
(Date:8/26/2015)... MIAMI , Aug. 26, 2015  The ... at the University of Miami Miller School of ... its clinical trial to test for the first ... was successfully completed.  This FDA approved Phase I/II ... islet transplantation and is an important first step ...
Breaking Biology Technology:Marken Ensures Safe Transportation Of Select Agents And Toxins 2MediVet Biologics Animal Health Secures Additional Laboratory Facility in Manhattan, Kansas 2MediVet Biologics Animal Health Secures Additional Laboratory Facility in Manhattan, Kansas 3Diabetes Research Institute Successfully Transplants First Patient In Pilot BioHub Trial 2Diabetes Research Institute Successfully Transplants First Patient In Pilot BioHub Trial 3Diabetes Research Institute Successfully Transplants First Patient In Pilot BioHub Trial 4
Cached News: