Tag: "ancestor" at biology news

Where Fossils Fear To Tread: Scientists Follow Genes To An Ancient Ancestor

...w finding powerful evidence that an ancient common ancestor - a worm-like animal from which most of world's an...as sosophisticated. We're talking about the common ancestor of all the most successful animals on Earth." What is so striking, according to Carroll, is...

Wild Plant Genes Increase Food Production

...dentified through genetic mapping, from the tomato ancestor L. pimpinellifolium. In tomato and rice plant varieties, the researchers sampled a variety of wild species available in seed repositories and found a high proportion -- almost a 50 percent increase -- of useful QTL alleles (mutated genes) that could...

Widespread Genus Of Monkeys Gives Up Genealogical Secrets To Columbia Researchers

...cularis, the long-tailed macaque, as the immediate ancestor of a smallgroup of Asian macaques that include the...ecial genetic proximity to thelong-tail. The real ancestor of the rhesus, Taiwan and Japanese macaque lineageis the rhesus monkey itself, the researchers belie...

Similarities Found In Human, Chimp Brains; Columbia, Mount Sinai, NIH Scientists Find Region That Controls Language Identical In Both Species

...ans have an enlarged planum temporale,their common ancestor probably had the feature as well, though the brain regionmay not have acquired its language functions until humans split off from otherprimates 6 to 8 million years ago. Finally, it may well be that the planumtemporale is not involved in language in...

Race And Human Evolution

...l living people are descendants of a single common ancestor named Eve. Wolpoff and Caspari maintain that both the fossil record and genetic datasupport a multi-regional theory of human evolution. According to this theory,human populations evolved concurrently in various regions over the past twomillion years...

Mouse Gene Reveals Clues To Human Deafness

... impairment was traced back five generations to an ancestor bornin 1843 in Libya. The family migrated through Tunisia and Egypt, eventuallysettling in Israel. The researchers identified 12 living family members withprogressive hearing loss, and 11 unaffected relatives older than age 40. Vahava determi...

Gene Study Shows Mammals Lived Before Extinction Of The Dinosaurs

...te when two species emerged from their last common ancestor necessarilyresults in an underestimation. "The bo... us that mouse and rat split from their lastcommon ancestor 41 million years ago--four times as long. The rodent fossilrecord appears to have some major gaps,"...

Max Planck Scientists Report Molecular Details On The Interaction Of The Stress Hormone Corticotropin-Releasing Factor (CRF) And Its Receptor

... frog CRF-R1 may derive from a common ancestor molecule....

New Fossil Discoveries Clinch Ancient Age Of Human Ancestor

...ught to be the most ancient known upright-walking ancestor of humans, according to research to be published ...rphism. Eventually we will find the last common ancestor of chimps and humans." This research was supported by the National Geographic Society in Washingt...

Crossing Bacterial/Archaeal Boundaries

...es have either been conserved from the last common ancestor possibly as much as 3 billion years ago, or they have been transferred horizontally between more recent ancestors....

Priestly Gene Shared By Widely Dispersed Jews

...ed an an estimated date for the most recent common ancestor ofcontemporary Cohanim. According to this analysis, the common ancestor livedbetween the Exodus (approx. 1000 B.C.E) and the destruction of the first Temple(586 B.C.E.), co...

Alstrom Syndrome Genetics Studied At Jackson Laboratory

...generations in this "kindred", connecting a common ancestor in1650 to five living children with Alström Syndrome. The children, from fournuclear families, range in age from 8 to 14. Because of the common ancestor, the researchers believe the five are"homozygous by descent", meaning that they inher...

Human Ancestors Went Out Of Africa And Then Came Back: NYU/SUNY-Albany Research Team Proposes Controversial New Model for Evolution of Humans

...pose instead that the lineage leadingto the common ancestor of all living apes dispersed out of Africa about 2...ell and Stewart find it more likely that thecommon ancestor of the "great" apes (orangutans, African apes and humans)evolved in Asia rather than in Africa. The ...

Symposium Explores Neandertal Question, Mystery Of Human Origins

...ndertal evolution on the European continent froman ancestor already separate from the evolutionary branch that led to Homosapiens. This would make Neanderthals a clearly distinct biological speciesfrom humans, despite the fact that they had similar brain capacities and hadevolved human-like culture and tool-m...

Large Gene Study Questions Cambrian Explosion

...s, plants, and fungi-- first divergedfrom a common ancestor and began evolving down separate evolutionary paths." That date--about 1.6 billion years ago--is the earliest yet obtained by genestudies for this evolutionary event, according to Hedges. The Penn State team used more than twice as many genes to da...

Viral Harpoon Structure Suggests Measles, HIV And Ebola Viruses Related

...ruses suggeststhat they might have had some common ancestor that shared a primitive version ofthe fusion protein. It is impossible at this point, however, to pinpoint theevolutionary origin of that ancestry, he said. Regardless, said Lamb. "knowing the structure of this one fusion proteinmay lead to the deve...

Vastly Different Virus Families May Be Related

... seniorauthors on the study. "It suggests a common ancestor among all these viruses,where one would have thought them not to be related at all." A team led by Lamb, who is John Evans Professor of Biochemistry, MolecularBiology and Cell Biology at Northwestern, and X-ray crystallographer Theodore S.Jardetzky, ...

University Of Chicago To Host 'Evo-Devo' Symposium

... example, scientists used to think that the common ancestor to allcomplex animals had to be a relatively complex creature itself, no matter howprimitive. But developmental geneticists think the creature might have beensimpler, relying on a few sets of genes to shuffle and rearrange to produce themyriad diffe...

Evolutionary genetic tools trace cancer clone lines

...onal model, the adenoma is the direct precursor or ancestor to thecarcinoma. But according to the new study, published in the June issue of the AmericanJournal of Pathology, genetic evolution analysis indicates that adenoma andcarcinoma lines can arise from a common precursor but subsequently develop inparall...

Team discovers new species of hominid

... markedlydifferent from its short-legged immediate ancestor from 3.6 million to 2.9million years ago -- "Australopithecus afarensis," popularly known as "Lucy." In a companion paper, some members of the research team announceevidence that antelopes and horses were butchered with the world's earliestst...

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