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Chimp in Biological News

The secret to chimp strength

February's brutal chimpanzee attack, during which a pet chimp inflicted devastating injuries on a Connecticut woman, was a stark reminder that chimps are much stronger than humansas much as four-times stronger, some researchers believe. But what is it that makes our closest primate cousins so much...

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...

Big differences in duplicated DNA distinguish chimp and human genomes

A study comparing the genomes of both humans and chimpanzees has found that much of the genetic difference between the two species came about in events called segmental duplications, in which segments of genetic code are copied many times in the genome. The study appears as a companion article to t...

Ancestral genome of present-day African great apes & humans had burst of DNA sequence duplication

... chimps is not found in these genetic differences. "What is certain is that genetic differences contribute significantly to what makes a human and chimp different, and we know that these regions of our genetic code are changing much more rapidly than most others. The next challenge will be making sense...

Small male chimps use politics, rather than aggression, to lead the pack, U of Minnesota study says

...male chimpanzees to maintain his top position. And Freud, who weighed 44.8 kg (98.6 lbs.), used a combination of the two strategies. (The average male chimp in Gombe weighs about 39 kg (85.8 lbs.). The findings are reported in the February issue of the American Journal of Primatology . While it's widel...

Thumbs up -- a tiny ancestral remnant lends developmental edge to humans

...gle human genetic fragment and compare it with the chimp version. The strategy, which links a color-induci...anges that evolve more rapidly since the human and chimp paths split six million years ago. When queried...next question that they asked was if the human and chimp elements have sequence differences, why do they st...

Did walking on 2 feet begin with a shuffle?

...ated it would not be metabolically efficient for a chimp to use bipedalism for distances greater than about...eople can test. You should rarely, if ever, see a chimp walking upright at longer distances. The flipside of this is if a chimp is going a short distance returning to all fours i...

Primate sperm competition: speed matters

... Rapidly swimming sperm cells would be evolutionarily favored when the mating pattern is polygamous and that is consistent with our measurements of chimp and rhesus macaque sperm, said Nascimento. The research team found significantly lower swimming forces and slower swimming speeds with human sperm,...

Ancient retrovirus sheds light on modern pandemic

...the sequencing of the chimpanzee genome. "When the chimp genome was sequenced, a team of scientists at the ...r found the largest difference overall between the chimp and human genomes was the presence or absence of P... Emerman's laboratory, used DNA sequences from the chimp genome to reconstruct a small part of the PtERV1 v...

Analysis of rhesus monkey genome uncovers genetic differences with humans, chimps

...aca mulatta) with that of human (Homo sapiens) and chimp (Pan troglodytes), the primate most closely relate...aque genome, combined with the availability of the chimp and human genomes, provides researchers with anoth... genome, a newer unpublished draft sequence of the chimp genome, the sequence of more than a dozen other mo...

UF scientists discover new genus of frogmouth bird in Solomon Islands

...Homo), while chimpanzees are our living relatives from a closely related genus (Pan), but that we share the same taxonomic family (Hominidae) with our chimp cousins. The Solomon Islands Frogmouth differs from other frogmouths in a number of significant ways. First, it is probably not as accomplished o...

Gene study shows three distinct groups of chimpanzees

...ted from central and eastern chimpanzees about 500,000 years ago and central and eastern chimps divided about 250,000 years ago. "Even though the chimp genome has been sequenced, it's amazing how little we know about their evolution and the level of variation within chimpanzees," said Przeworski. "The...

E. coli bacteria migrating between humans, chimps in Ugandan park

... Uganda, and McGill University in Montreal, examined two of 10 known communities of chimpanzees living in Kibale National Park, Uganda. One of the two chimp groups has been the focus of two decades of research by international teams of scientists. The other is regularly visited by employees of a local tour...

Genetic study of Neanderthal DNA reveals early split between humans and Neanderthals

...ions where the Neanderthal sequence matched more closely to that of chimpanzee and not human. Using the comparison of the Neanderthal to the human and chimp genomes enabled the investigators to estimate the human-Neanderthal divergence timeline. The scientists also used data from the HapMap genome proj...

Wild Gorillas Handy with a Stick

...y in the Journal of Mammalogy (recounted by primatologist Frans de Waal in The Ape and the Sushi Master). After spotting a shell mound, Beatty saw a chimp “come ambling round a bend bearing an armful of dried palm nuts,?sit down beside a rock, select a nut, place it on a flat rock surface, and pound it w...

Carnegie Mellon scientists create PNA molecule with potential to build nanodevices

...on changes, including whether metabolically active non-brain tissues display similar patterns of changes, and whether the divergence between human and chimp patterns was the direct result of selection, or was an inevitable consequence of some other difference in brain evolution. The patterns seen in this s...

Navigating the brain for sense of direction as paradigm for higher cognitive functions

...on changes, including whether metabolically active non-brain tissues display similar patterns of changes, and whether the divergence between human and chimp patterns was the direct result of selection, or was an inevitable consequence of some other difference in brain evolution. The patterns seen in this s...

Gene Expression in the Aging Brain

...on changes, including whether metabolically active non-brain tissues display similar patterns of changes, and whether the divergence between human and chimp patterns was the direct result of selection, or was an inevitable consequence of some other difference in brain evolution. The patterns seen in this s...

Chimp genome reveals a retroviral invasion

...was significantly greater than between gorilla and chimp -- even though slightly more evolutionary time separates gorilla and chimp than macaque and baboon. When a retrovirus repr...ocess of evolution itself. Citation: (2005) The chimp Genome Reveals a Retroviral Invasion in Primate Ev...

Retrovirus struck ancestors of chimpanzees and gorillas millions of years ago, but did not affect ancestral humans

...March 1. Researchers studying portions of the genome containing 'retroelements,' also known as junk DNA, found many copies of a gene sequence in the chimp and gorilla genome that didn't appear anywhere in the human genome. They translated that genome sequence into its corresponding protein, and discovere...

Study Links Ebola Outbreaks To Animal Carcasses

...iod, 98 animal carcasses were discovered in the region straddling northeast Gabon and the northwest Republic of Congo. Of these carcasses, 21 gorilla, chimp and duiker carcasses were tested for the Ebola virus, with 14 samples being found positive. In 11 cases, instances of human infection were directly li...
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