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ancestor in Medical News

Apes Love a Good Laugh, Too

...apes and humans has its origins with mankind's evolutionary ancestors. In fact, the researchers point to the origin of laughter in a common primate ancestor that lived between 10 million and 16 million years ago. The findings were published online June 4 in the journal Current Biology . "This is a v...

New Insight Into Primate Eye Evolution

...embryo from a single type of immature cell, called a retinal progenitor cell. "These two species evolved about 15 million years ago from a common ancestor that had a diurnal eye," Dyer said. "So, we believe that comparing how their eyes develop during embryonic growth could help us understand what evolut...

Complete Genomes of All Known Human Rhinoviruses are Published

...ny of all complete HRV genomes, the team gained new insight into rhinovirus evolution. They clearly showed that HRV-A and HRV-C evolved from a common ancestor and that HRV-B is "sister" group to the other two species. Interestingly, the team also uncovered within the HRV-A strain what they believe could be a...

Evolution and epilepsy

...um channel clustering evolved first, perhaps 100 million years before myelin," says Cooper. "Myelin appeared, like potassium channel clustering, in an ancestor of the shark. This interval provides plenty of time for the molecules necessary for myelination to evolve. Each step made the nerve faster, and more...

DNA Testing and Genetic Profiles Help Avoid Broken Hearts Polls Reveal

...earch platform managed by morefocus media. The results will be available in January 2009 at http://www.ancestor-dna.com [Ancestor-DNA.com __title__ ancestor DNA and Genetic Testing]. About morefocus group inc. San Diego- and London-based morefocus group inc., carries out independent research, build...

Genome sequence of lancelet shows how genes quadrupled during vertebrate evolution

...be the case. "Amphioxus and humans had a common ancestor 550 million years ago, which allows us to use amphioxus as a surrogate for that ancestor in terms of understanding how vertebrate genomes e... confidence that 550 million years ago, the common ancestor of amphioxus and humans had 17 chromosomal element...

A chunky metabolism

...e with one set of environments and another to cope with another. Many bacteria transfer genes among themselves, instead of simply handing them from ancestor to descendent. Bacteria that do more of this also tend to be more modular. If you are going to give away and get parts of different networks, it makes...

Huge virulence gene superfamily responsible for devastating plant diseases

...late how plant cells work in such a way as to make the plant hosts more susceptible to infection. The results suggest that a single gene from a common ancestor of the both pathogen species has spawned hundreds of very different, fast-evolving genes that encode for these highly damaging effector proteins. ...

Adult stem cell changes underlie rare genetic disease associated with accelerated aging

...arise from a common developmental pathway, Misteli and Scaffidi looked at the effects of progerin on adult mesenchymal stem cells, the common cellular ancestor of these tissue types. An adult stem can renew itself, and can differentiate to yield the major specialized cell types of the tissue or organ. Their e...

Adapting to pregnancy played key role in human evolution, study shows

...first time in the Dec. 13 issue of Nature. The researchers believe the adaptation first appeared at least two million years ago, in the early human ancestor Australopithecus. The male-female difference does not appear in chimpanzees, meaning the evolution to walking upright led to the adaptation. "Natur...

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ancestor in Medical Technology

Ancestry.com DNA Testing Reveals 'Roots' Author's Scottish Ancestry

...ceived an e-mail from a Scottish woman in the database, June Baff Black, whose father's DNA very closely matched his. According to the DNA results, an ancestor who likely lived in the 1600 or 1700s in Scotland connects Mr. Haley with Ms. Black, making them distant cousins. Mr. Haley and Ms. Black met for the ...
ancestor in Medical Definition

Medicine

...f various kinds in which: animism (the notion of inanimate objects having spirits); spiritualism (here meaning an appeal to gods or communion with ancestor spirits); shamanism (the vesting of an individual with mystic powers); and divination (the supposed obtaining of truth by magic means), played a m...
ancestor in Biological News

Earth's original ancestor was LUCA, not Adam nor Eve

This release is available in French . Montreal, December 17, 2008 Here's another argument against intelligent design. An evolutionary geneticist from the Universit de Montral, together with researchers from the French cities of Lyon and Montpellier, have published a ground-breaking study ...

Blue-eyed humans have a single, common ancestor

New research shows that people with blue eyes have a single, common ancestor. A team at the University of Copenhagen have tracked down a genetic mutation which took place 6-10,000 years ago and is the cause of the eye colour of all blue-eyed humans alive on the planet today. What is the geneti...

Restoring a natural root signal helps to fight a major corn pest

...o protect the plants against underground infestation." The EβC trait is present in other, mainly European, corn varieties as well as in the maize ancestor species. The trait could be reintroduced into deficient plants by conventional breeding. On the other hand, generating EβC emitting maize varieti...

Bizarre walking bat has ancient heritage

... A bizarre New Zealand bat that is as much at home walking four-legged on the ground as winging through the air had an Australian ancestor 20 million years ago with the same rare ability, a new study has found. The discovery overturns a long-held held view that the agile walking and cli...

Humans related to orangutans, not chimps, says new Pitt, Buffalo Museum of Science study

...in that suggests humans most likely share a common ancestor with orangutans, according to research from the Un...cted a scenario for how the human-orangutan common ancestor migrated between Southeast Asiawhere modern orangu... they propose that the last common human-orangutan ancestor migrated between Africa, Europe, and Asia at some ...

Discovery raises new doubts about dinosaur-bird links

...rocodiles, in fact, is much more similar to dinosaurs than it is to birds. "We aren't suggesting that dinosaurs and birds may not have had a common ancestor somewhere in the distant past," Quick said. "That's quite possible and is routinely found in evolution. It just seems pretty clear now that birds were...

Harvard scientist says we are what we eat -- and what we cook

...n it, he makes the case that the ability to harness fire and cook food allowed the brain to grow and the digestive tract to shrink, giving rise to our ancestor Homo erectus some 1.8 million years ago. "Cooking is the signature feature of the human diet, and indeed, of human life -- but we have no idea why,...

CU-Boulder study shows 53 million-year-old high Arctic mammals wintered in darkness

...rom the fossil teeth of three varieties of mammals from Ellesmere Island -- a hippo-like, semi-aquatic creature known as Coryphodon, a second, smaller ancestor of today's tapirs and a third rhino-like mammal known as brontothere. Animal teeth are among the most valuable fossils in the high Arctic because th...

Studies shed light on collapse of coral reefs

...als that helps it develop its external skeleton conserved in the different species over hundreds of millions of years since they parted from a common ancestor on their separate evolutionary paths. There's still much to learn about this process, researchers said, and tremendous variation in it. For one thi...

University of Florida study provides insight into evolution of first flowers

... The goal of this research is to understand the original regulatory program, or set of genetic switches, that produced the first flower in the common ancestor of all living flowering plants, said Pam Soltis, study co-author and curator of molecular systematics and evolutionary genetics at the Florida Museum....

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ancestor in Biological Technology

Efforts to avoid friendly fire spawned ancestor of todays RFID

British soldiers seeking ways to identify friendly aircraft in World War II were given a newly developed radar transponder system called IFF - Identification Friend or Foe. It was a crude system, but it was a way to tap into technology to identify something at a distance. Fast forward 65 years, a...

Single gene controls key difference between maize and its wild ancestor

Madison, Wis. -- One of the greatest agricultural and evolutionary puzzles is the origin of maize -- and part of the answer may lie in a plot of corn on the western edge of Madison, where a hybrid crop gives new life to ancient genetic material. While many biologists argue that teosinte, a wil...

Researchers at the University of Georgia Discover Protein is Crucial to Reproduction of Parasites Involved in Disease

...rent work suggests that cells have the ability to retool these proteins to perform novel tasks, in this case to divide the symbiotic alga that was the ancestor of the apicoplast. The group generated a mutant cell line to disrupt DrpA function in T. gondii. Using modern genetic and microscopy techniques, t...

Tips from the journals of the American Society for Microbiology

...5047-5052.) New Oral Vaccine May Protect Against Bubonic Plague Researchers from the Institut Pasteur in Paris, France used a less virulent ancestor to the highly infectious bubonic plague to develop a potentially safe, efficient and inexpensive live oral vaccine. They report their findings in the...

MyHeritage And Family Tree DNA Partner To Help People Trace Family History Using DNA

...ion contained in their DNA to find present-day relatives who share a common ancestor from many hundreds of years ago. FamilyTreeDNA users can take advantage of ...ion contained in their DNA to find present-day relatives who share a common ancestor from many hundreds of years ago. FamilyTreeDNA users can take advantage of ...

Tips from the journals of the American Society for Microbiology

...5047-5052.) New Oral Vaccine May Protect Against Bubonic Plague Researchers from the Institut Pasteur in Paris, France used a less virulent ancestor to the highly infectious bubonic plague to develop a potentially safe, efficient and inexpensive live oral vaccine. They report their findings in the...

Use it or lose it? Researchers investigate the dispensability of our DNA

...ed the genomes of six mammals, investigating ultraconserved elements that are shared between primates and closely related mammals, were present in the ancestor of modern rodents, but have been lost in the rodent lineage more recently. The researchers found that the genomic evidence supports an important biol...

Tips from the journals of the American Society for Microbiology

...5047-5052.) New Oral Vaccine May Protect Against Bubonic Plague Researchers from the Institut Pasteur in Paris, France used a less virulent ancestor to the highly infectious bubonic plague to develop a potentially safe, efficient and inexpensive live oral vaccine. They report their findings in the...

Consortium publishes Phase II map of human genetic variation

...ls. Their analysis showed that 10 to 30 percent of the DNA segments analyzed in each population showed shared regions indicating descent from a common ancestor within 10 to 100 generations. In addition, the new map enabled researchers to quantify more precisely the rates of shuffling, or recombination, se...

Part 4 Project Performance Get on the path to continuous improvement

... use it and avoid anarchy! Part five of this series will focus on the Software Engineering Institute's Capability Maturity Model (SEI CMM). Its the ancestor of the maturity models that have an ultimate goal of continuous improvement. ...
ancestor in Biological Definition

Adaptive radiation

...t 300 million years ago. The dynamics of adaptive radiation is such that, within a relatively short time, many species derive from a single or a few ancestor species. From this large number of genetic combinations, only a few can survive on long term. After the rapid development of many new species, lots or...

Biology

...id to have common descent if they have a common ancestor . All existing organisms on Earth are descended from a common ancestor or ancestral gene pool . This "last universal common ancestor, that is, the most recent common ancestor of all organisms, is believed to have appeared abo...

Cladistics

...rganisms contained in any one clade share a unique ancestor for that clade, one which they do not share with a...see below) that seems to be posessed by the common ancestor of a group is described as ancestral , and one th...s which ones were present before the last common ancestor of the group of species ( symplesiomorphies ) and ...

Common descent

...id to have common descent if they have a common ancestor . In biology , the theory of universal common de... organisms on Earth are descended from a common ancestor or ancestral gene pool. A theory of universal c...pted by biologists, and the last universal common ancestor (LUCA or LUA), that is, the most recent common...

Evolution

...orthand for both the modern theory that all extant species share a common ancestor as well as the mechanisms through which natural selection acts to change ...on descent proposes that all organisms on Earth are descended from a common ancestor or ancestral gene pool. Evidence for common descent may be found in trait...

Extinction

...or example the extinct Eohippus (an ancient horse-like animal) was the ancestor of several extant species including the horse , the zebra and the donk...stion must be identified uniquely from any daughter species, as well as its ancestor species or other closely related populations, if it is to be declared extin...

Gene duplication

...major evolutionary force. Some have argued that gene duplication is the most important evolutionary force since the emergence of the universal common ancestor . Major genome duplication events are not uncommon. It is predicted that the entire yeast genome underwent duplication only ~1,000,000 years ago. ...

Human

... an afterlife . Institutions of inheritance or ancestor worship may extend an individual's presence beyon... and Homo paniscus , given their sharing a recent ancestor with man. [3] Humans exhibit fully bipedal locom... those individuals who share a common matrilineal ancestor . A mathematical analysis of mitochondrial DNA fro...

Monophyletic

... group that contain organisms but not their common ancestor is called polyphyletic , and a group that contain... but not all descendants of the most recent common ancestor is called paraphyletic . For example, all organ...at Homo habilis had developed from a different ancestor than Homo sapiens , and this...

Origin of life

...iple Biogenesis Drake equation Fine-tuned universe Important publications in origin of life Panspermia Universal common ancestor Zeolites References PMID 11882894 (Cited on p. 108). Huber, C. and Wchterhuser, G., (1998) "Peptides by activation of amino ac...
ancestor in Biological Dictionary

Tetrapod

...ges of encyclopedia entries, essays, summaries, research information, and more. ... Search " Tetrapod " ... All tetrapods descended from a common ancestor that just happened to have limbs ... The pentadactyl limbs that tetrapods far and wide all have are examples of ... Flickr is almost certainly ...

Placental mammals

...acenta ... Placental mammals are separated into large groups based on their characteristics ... Researchers have discovered the earliest known ancestor of the group of mammals that give birth to live young. The finding is based on a well-preserved fossil of a ... Carnegie Museum of Natural Hist...

Paraphyletic

...etic if the group contains its most recent common ancestor but does not contain all the descendants of that a...ionary grades, ... A paraphyletic group is an ancestor species and most of its descendants, usually ...... plants" is paraphyletic because its last common ancestor ... Reptilia alone is paraphyletic since it e...

MtDNA

.... Nass and Sylvan... Mitochondrial Eve (mt-mrca) is the name given by researchers to the woman who is defined as the matrilineal most recent common ancestor (MRCA) for all currently living humans. Passed down from mother to offspring, her... DNA Heritage offers DNA testing for both amateur and professio...

Monophyletic

...common cladistic usage, a monophyletic group is a clade, consisting of an ancestor and all its descendants. The term is synonymous with the uncommon term holo...s have introduced a taxonomy. If there is a group, that is made of a common ancestor (or parent), and all its descendants (children), they call that group mono...

Gene cluster

... A gene cluster is a set of two or more genes that serve to encode for the same or similar products. Because populations from a common ancestor tend to possess the same varieties of gene clusters, they are useful for tracing back recent evolutionary history. Because of this, they were used b...

Consanguinity

...at respect, consanguinity is the quality of being descended from the same ancestor as another... consanguinity n. , pl. -ties . Relationship by blood or ...e as ... Consanguinity is the quality of being descended from the same ancestor as another person. ... Burtsell, Richard L. " Consanguinity (in Canon Law)...

Common descent

...escent if they have a common ancestor. In modern biology, it is generally accepted that all living organisms on Earth are descended from a common ancestor or ancestral gene pool. The wide range of evidence of common descent of living things strongly indicates the occurrence of evolution and prov...

Clade

..., the scientific classification of living and fossil organisms, to describe a monophyletic group, defined as a group consisting of a single common ancestor and all its... The concept of a clade is central to cladistics. A clade consists of a single organism and all of its descendents. ... Total...

Anagenesis

...eral biology, anagenesis is an evolution ary change producing a single ... Anagenesis accounts for why most organisms do not resemble the common ancestor ... Anagenesis - Wikipedia, the free encyclopedia. Anagenesis , also known as "phyletic change," is the evolution of species ... anagenesis...
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