Tag: "promiscuous" at biology news

Unknotting DNA clue to cancer syndrome

... SGS1 was defective, yeast chromosomes became more promiscuous in combining with each other as they attempt to repair breaks in the DNA. Normally, to repair broken DNA, matching chromosomes associate so that an intact chromosome can act as a template for the damaged one. The DNA strands are then exchanged to f...

Philandering female felines forgo fidelity

...emales. It seems that female cheetahs are highly promiscuous with no detectable mate fidelity between breeding seasons, said Dr. Sarah Durant, a researcher with the Wildlife Conservation Society/Tanzania Cheetah Conservation Program and project leader. In fact, we now know many of the fathers exist outside the...

Research suggests men's sexual behavior adapts to perceived threats

... Aaron T. Goetz, this does not mean that women are promiscuous by nature, but it is evidence that humans are not naturally a monogamous species. Shackelford is quick to point out, however, that females are not passive partners in the sexual relationship. "Although this review focused on male adaptations, sexua...

Rodent sperm work together for better results

... especially likely to be the case when females are promiscuous and sperm of one male have to compete against thos...artment of Animal and Plant Sciences shows that in promiscuous rat and mice, where competition is high, individual sperm cooperate with one another in order to out...

Male chimpanzees prefer mating with old females

...at whereas chimpanzees participate in a relatively promiscuous mating system, humans form unusually long-term mating bonds, thereby making young females more valuable as mates with greater reproductive potential. The findings, reported by Martin Muller of Boston University and colleagues at Harvard University, a...

Comprehensive model is first to map protein folding at atomic level

... living cells to recognize correct partners versus promiscuous ones?"...

Evolutionary harmony for stinkbugs and their gut bacteria: A perfect match

...ggests that not all gut symbionts opt for the more promiscuous lifestyle. Takahiro Hosokawa, Takema Fukatsu, and colleagues provide the first evidence of cospeciation between a group of gut symbionts and their insect hosts, plataspid stinkbugs. Not only do their evolutionary histories mirror each other, but the...

Sniffing out relatives, bluegill sunfish use self-referencing to recognize kin

Many animal societies involve highly promiscuous mating behavior, making it potentially complicated...ives. Researchers have now shown that offspring of promiscuous male bluegill sunfish compare the odor of nest-mates to their own genetically determined odor, and p...

Penn researchers discover gene that creates second skeleton

...e FOP mutation causes a molecular short circuit or promiscuous activation of the receptor, but the detailed molecular physiology is still being deciphered," says Kaplan. "Such knowledge will be essential to develop treatments and an eventual cure for FOP." "To really understand the physiological consequences, we...

At Berkeley: Intelligently designed molecular evolution

...environment. Driven by selective pressures, these promiscuous enzymes and other proteins evolved along divergent...highly dependent on the fact that the functions of promiscuous proteins can be altered with just a small number of amino acid substitutions, a property known as pl...

Global signaling study suggests cancer link to protein promiscuity

...-- when present at high concentrations. "These two promiscuous ErbB proteins are known to be overactive in many h...ary pathways that are inappropriately activated by promiscuous proteins." The researchers studied interactions between signaling proteins and the ErbB receptors us...

New ECCO 13 data emphasise vital importance of cervical cancer detection, treatment and prevention

... can include: having multiple sexual partners or a promiscuous partner, history of sexually transmitted disease, sexual intercourse at a young age and women who smoke, oral contraceptive use and giving birth to many children. It is commonly found in middle aged women and of women from poor socioeconomic status g...

Chernobyl: The true scale of the accident

...d, overuse of alcohol and tobacco, and unprotected promiscuous sexual activity. What was the environmental impact? Ecosystems affected by Chernobyl have been studied and monitored extensively for the past two decades. Major releases of radionuclides continued for ten days and contaminated more than 200,000 s...

Two new lemur species discovered

...l ears and large testes, which are suggestive of a promiscuous mating system. "Zaza" is the Malagasy word for "child" or "children." This name was chosen because the new species is the smaller of the two Mirza species. Also, with this name the new lemur is dedicated to Madagascar's children, to remind them of...

Larry Young on animals and autism clues, environmental impact on hormone brain function

...al attachments, while montane and meadow voles are promiscuous breeders and don't form social attachments at all," Young says. Soon, "using comparative molecular approaches, I began to investigate the molecular mechanisms underlying the species behavior differences. Now, by gaining an understanding of the mechan...

Meaningless sex? Male mounting reduces sexual promiscuity of females

... tested this idea in the feral chicken, a sexually promiscuous species. By using a novel but technologically simple technique--fitting some hens with a light plastic harness covering their cloaca and thus preventing insemination--the researchers were able to separate the effect of insemination products from that...

Animal parenting, personality and pair-ups

...f extra DNA in the monogamous voles but not in the promiscuous ones. Similar variations in this gene have also been found in humans. "Other studies have found associations between this genetic variability and autism, which is a disease that affects social bonding and behavior. So, there's an interesting question...

Weizmann Insitute scientists show how proteins beat the evolutionary stakes

... Department, believes that proteins with so-called promiscuous or moonlighting activities can provide nature with...tants with higher levels of activity in one of the promiscuous traits. After several rounds of mutation and selection, the scientists looked at their enzymes ...

Sexual competition drives evolution of a sex-related gene

...osity evolves more rapidly in primate species with promiscuous females than in monogamous species. The finding de... saw a clear correlation whereby species with more promiscuous females showed much higher rates of protein evolution than species with more monogamous females," sa...

Yerkes researchers to present array of new data at Society for Neuroscience Meeting

...y systems, in the brains of monogamous prairie and promiscuous meadow voles. (11 a.m. 12 noon) discovered CRF...us accumbens of the monogamous species but not the promiscuous species. (12 noon 3 pm) Together, the CRF findings potentially explain the species' opposite soci...

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