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Tag: "choose" at biology news

Physicist cracks women's random but always lucky choice of X chromosome

...ysicist has uncovered how female cells are able to choose randomly between their two X chromosomes and why that choice is always lucky. Human males have both a X and a Y chromosome but females have two X chromosomes. This means that in an early stage in the development of a woman’s fertilised egg the cells...

Study investigates 'divorce' among Galapagos seabirds

... from taking care of junior, his mate is likely to choose another. A male’s capacity to raise offspring, a quality that can vary with time, may carry more weight with a mate than stellar genes or past breeding success, Maness said. She used 14 years of data on about 950 males and 700 females in the stud...

454 sequencing identifies HIV drug resistance at early stage

...re, hopefully clinicians can use this knowledge to choose better antiretroviral drug combinations that have the ability to suppress these resistant HIV strains which will lead to better clinical responses in patients.” While treatment of HIV has been largely successful, with dramatic increases in surviva...

Eavesdropping comes naturally to young song sparrows

...res have found the first evidence that young birds choose many of their songs by eavesdropping on the tuneful interactions between other sparrows. In laboratory experiments, the young sparrows were exposed to two adult "tutors," one of which they directly interacted with vocally and a second one that the...

Scripps research team sheds light on long-sought cold sensation gene

...ture gradient, or in an enclosure where they could choose between two temperatures, mice without TRPM8 showed essentially no preference in the temperature range of 18 to 31°C, suggesting their ability to sense this range was completely disabled without the gene. Normal mice, on the other hand, found cold te...

Protein enables discovery of quantum effect in photosynthesis

...ously sample all the potential energy pathways and choose the most efficient one." Fleming is also a professor of chemistry at UC Berkeley, and an internationally acclaimed leader in spectroscopic studies of the photosynthetic process. In a paper entitled, "Evidence for wavelike energy transfer through q...

Why do oysters choose to live where they could be eaten?

...being eaten by cannibalistic adults, oyster larvae choose to settle in areas of high oyster concentrations to take advantage of future benefits of increased reproductive capacity when they mature. "Oyster larvae make a life or death decision when they get their one chance to select where to attach themse...

DOE JGI sets 'gold standard' for metagenomic data analysis

...omics in general. It will help groups like mine to choose efficient strategies for the development of automated methods for high-throughput metagenome analysis. And last, but not least, it will stimulate the development of new computational tools and approaches for studies of microbial communities." In a...

NIDA study identifies genes that might help some people abstain from smoking

...essation programs by helping health care providers choose the most appropriate treatment based on individual differences.? Dr. Uhl and his colleagues performed a genome-wide analysis on the DNA of two types of nicotine-dependent individuals, one that was able to successfully quit the cigarette- smoking be...

Male owls pitch their hoots to advertise body weight to competitors

...e whether females use these quality cues when they choose their mating partner." "The vocal communication of owls has interesting similarities to that of terrestrial mammals where the information is typically encoded in acoustic components of the calls rather than in the diversity of the vocal repertoire as...

Africa's first large-scale HIV vaccine study launches

...ion also will be provided to male participants who choose to undergo the procedure. ...

New technologies coming too fast for Indian farmers

...ial learning" ?farmers relying on word of mouth to choose seeds. "Very few farmers were doing experimental testing, they were just using it because their neighbors were," Stone says. "There has been a breakdown in the process of farmers evaluating new seed technologies." 'De-skilling' While Bt see...

Reading hidden intentions in the human brain

...of the action. Specifically, subjects were free to choose between adding or subtracting two numbers and were asked to hold in mind their intention until numbers were presented on a screen, along with a choice of outcomes (one of which was correct for the addition choice, one correct for the subtraction choi...

Scientists find method to pick noncompetitive animals, improve production

...designed mathematical equations based on traits to choose animals that are more congenial in groups, said William Muir, a Purdue Department of Animal Sciences geneticist. The new method is a tool that may contribute both to animal well-being and to securing the world's future food supply, including possibly...

Rewarding fat rats

...ween life and death. When rats and other animals choose the thing that leads to a "reward," such as food, changes happen in the body and the brain. Describing and understanding those changes has been the focus of Natural Sciences and Engineering Research Council (NSERC) grantee Peter Shizgal for most of h...

Baby fish 'smell their way home'

...it from other reefs. "We think some fishes then choose currents that smell like 'home' and swim up them. The ones that cannot do this perish. The ones that get home preserve the unique 'ethnic' make-up of their tribe ?and so continue the process of evolving into separate new species." How the fish l...

Biologists call for better choice of model organisms in 'evo-devo'

...w model organisms. This occurs when scientists choose an organism because it was the first to branch off...nal criteria, such as molecular branch lengths, to choose species as best representatives of ancestral body plans," said Dr Jenner. "Just because an organi...

Human preference for other species could determine whether they survive

...e feelings are going to play a big role in what we choose to conserve."...

Men with prostate cancer avoid radiation due to misconceptions

...their treatment." Men with prostate cancer often choose between external beam radiation therapy, radiation...k for several weeks. Many men with prostate cancer choose external beam radiation over other treatments because it is non-invasive, has a short recovery perio...

Math model predicts cancer behavior

...." In the model, when cells divide they randomly choose from a set of 100 different "phenotypes" ?behavior...genetic characteristics. For example, a cell might choose characteristics that allow it to divide more quickly or to detach from its neighbors. The investigat...

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