Genetics & Molecular Biology
A female moth selects a mate based on the scent of his pheromones. An analysis of the pheromones used by the European Corn Borer (ECB, Ostrinia nubilalis) shows that females can discern a male's ancestry, age and possibly reproductive fitness from the chemical cocktail he exudes.
Jean-Marc Lassance and Christer Löfstedt from Lund University, Sweden, studied the influence of pheromones on mating preferences and carried out an analysis of the composition of the scent and genetic makeup of the animals involved. In addition, they compared the odor bouquet used by males with the scent used by females to attract potential mates.
Women can take pride that they are more efficient than men in many ways, including one that is not so great; storing fat.
It's a paradox women have discussed for generations – their apparent ability to store fat more efficiently than men, despite eating proportionally fewer calories. While it has long been suspected that female sex hormones are responsible, a University of New South Wales (UNSW) research review has for the first time drawn a link between one hormone – estrogen – and its impact on fat storage for childbearing.
Teams of scientists from Australia and the United States have used yeast and mammalian cells to discover a connection between genetic and environmental causes of Parkinson's disease.
Yeasts are single cell organisms, used widely in biological research because their structure resembles that of cells found in animals and humans. Yeasts share many genes, or their functional equivalents, with humans and offer the ability to screen or test thousands of genes and analysing their effects.
A system of opposing genetic forces determines why mammals develop a single row of teeth, while sharks sport several, according to a study published today in the journal Science. When completely understood, the genetic program described in the study may help guide efforts to re-grow missing teeth and prevent cleft palate, one of the most common birth defects.
A major mystery about the origins of life may be resolved if a new hypothesis holds up, says a study published in Nature. Two Université de Montréal scientists have proposed a new idea for how a 'universal molecular machine', the ribosome, might have managed to self-assemble as a critical step in the genesis of all life on Earth.
Plants are obviously essential to our survival and that of most other animals on earth but it is easy to overlook how they have become discretely embedded into our everyday lives; plants provide us with food, medicines, and raw materials used by our industries.
Despite their importance, very few of us could name more than a tiny fraction of the plants that surround us and while most of us could easily between a buttercup and a dandelion (provided both are in flower), only a hand full of experts could identify all 1600 native plants in the UK - and nobody is able to name all of the 250,000 or so plant species recorded world-wide.
Research performed in the Center for Biomolecular Science&Engineering (CBSE) at the University of California, Santa Cruz, suggests that mobile repetitive elements--also known as transposons or "jumping genes"--do indeed affect the evolution of gene regulatory networks.
I am a firm believer in the possibility and promise of embryonic stem cells. In a politically, religiously and even scientifically charged climate, this is a risky thing to announce. But as a journalist, I must divorce myself from my own personal opinions and biases and present the facts.
That being said, it is still satisfying writing upon a topic that you believe in. This was the case when I wrote an article about Geron Pharmaceuticals recently launched human clinical trials using embryonic stem cell research
to repair spinal cord damage.
Neandertals were the closest relatives of currently living humans. They lived in Europe and parts of Asia until they became extinct about 30,000 years ago. For more than a hundred years, paleontologists and anthropologists have been striving to uncover their evolutionary relationship to modern humans.
A common gene regulatory circuit controls the development of all dentitions, from the first teeth in the throats of jawless fishes that lived half a billion years ago to the incisors and molars of modern vertebrates (that includes you and me), say researchers from Georgia Institute of Technology and the University of Georgia.