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Can our genes tell the story of our divergence?

Since humans and chimpanzees forged separate evolutionary paths some 5 million to 6 million years ago, we shed our hirsute coat and heavy brow, mastered bipedal locomotion, and acquired a knack for abstract thought while our next of kin learned to use tools, and developed the skills to construct tree-bound nests high above the forest floor. We differ by just a tad over 1% at the DNA sequence leve...

Divergent life history shapes gene expression in brains of salmon

Scientists working with salmon have found that gene expression in the brain can differ significantly among members of a species with different life histories. Their study indicates that roughly 15 percent of Atlantic salmon genes show differential expression in males who migrate from their freshwater birthplaces to mature in oceans versus those who do not leave the freshwater environment to matur...

Divergent mating systems and parental conflict as a barrier to hybridization in flowering plants

Sexual reproduction can be thought of as a cooperative process in which two individuals come together to produce a new individual. It can also be viewed as a process in which two parties with differing interests, investment, and background interact to produce a new individual. From the former perspective, parental interests are unified (both wish to produce vigorous offspring), while the latter s...

Convergent evolution of molecules in electric fish

Having a set of extra genes gave fish on separate continents the ability to evolve electric organs, report researchers from The University of Texas at Austin. Dr. Harold Zakon and colleagues, in a paper recently published in Proceedings of the National Academy of Sciences, show that African and South American groups of fish independently evolved electric organs by modifying sodium channel...

Unraveling where chimp and human brains diverge

Six million years ago, chimpanzees and humans diverged from a common ancestor and evolved into unique species. Now UCLA scientists have identified a new way to pinpoint the genes that separate us from our closest living relative ?and make us uniquely human. The Proceedings of the National Academy of Sciences reports the study in its Nov. 13 online edition. "We share more than 95 percen...

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Barriers will not stop convergence of medical technologies

During residency, which is not the free-for-all carnival that Gray's Anatomy would have us believe, one of the most important judgment calls that is learned is whether the patien...

Personalized medicine and technology convergence

It's been one year since the debut of MedTech Futures and it has been a pleasure and a privilege to have the opportunity to share ideas with through this forum. As this column enters its second year, I wanted to take an opportunity to briefly summarize some of the perspectives over the past year and also discuss a topic of great timeliness and importance - namely pe...

IP Surveillance - Another Piece of the Converged Network

IP surveillance, has emerged as a new leading security solution that combines networking infrastructure and video equipment to provide a more holistic and efficient approach to security. It is a logical step in the quest for completely converged networks. Most security imperatives from an IT perspective have been focused on firewalls, VPNs, intrusion detection and a host of similar compo...

WTN Visions: Convergence is changing business

Convergence, the architecture for voice, video and integrated data that combines business and technology strategies, is redefining the word virtual. It is no longer a murky technology concept it is a leading-edge business solution. By eliminating boarders, physical boundaries, brick and mortar, convergence allows companies to communicate more completely and at a lower cost, thus increasing produ...

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Convergent evolution

describes the process whereby organisms not closely related independently acquire similar characteristics while evolving in separate and sometimes varying ecosystems. wings</ ...

Convergent evolution

describes the process whereby organisms not closely related independently acquire similar characteristics while evolving in separate and sometimes varying ecosystems. wings</ ...

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Convergent evolution

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Convergence

ary development of similar external morphological <a href="/ ?q=/ Biology-Diction...

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Holy Grail Of Dermatologists On The Verge Of Discovery

The hoary saying that there is no cure for jealousy or baldness may be a thing of the past . Scientists from the University of Pennsylvania have reported in the journal Nature, that it may indeed be possible to grow new hair follicles. The findings, which stemmed from a study examining wound healing in animal models, showed that mice were able to grow new hair follicles over skin newly...

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