Tag: "female" at biology news
Alien woodwasp, threat to US pine trees, found in N.Y.
...entified by a Cornell University expert, the adult female
alien is the only one of its kind ever discovered ...ble imports from Spain and Italy. In addition, one female
was found in a warehouse in Indiana in 2002. Experts suspect that the female
alien that was trapped ...
Size matters: fish genitalia attractiveness vs. predatory escape value
...of genitals," said Layman. The researchers studied female
preference and male swimming performance in these two species of mosquitofish. In laboratory experiments, females preferred to spend time with videos of males displaying digitally enlarged gonopodia rather than those with average-sized gonopodia, imp...
PNAS highlights for the week of May 16 - 20
... studied. Brian Langerhans and colleagues studied female
preference and swimming performance in western and Bahamas mosquitofish. Mosquitofish cannot retract their gonopodia--modified anal fins through which males transfer sperm to females--and they often display or swing them during courtship. In laborat...
Stegosaur plates and spikes for looks only, researchers say
... we don't see a clear distinction between male and female
stegosaurs. Without sexual dimorphism, you have no evidence for sexual selection, so you can't invoke sexual display as an explanation." As for heat exchange, one major reason earlier scientists proposed such a function for stegosaur plates is that t...
Mother birds increase progesterone to hatch females
...at progesterone, the major hormone produced by the female
bird's preovulatory follicle." To test the influen...perimentally manipulated levels of progesterone in female
chickens during the first meiosis. They injected either a low dose or a high dose of progesterone (d...
Scientists generate patient-specific stem cells, Science study says
... oocytes with nuclei from skin cells from male and female
patients, ranging in age from 2 to 56, who had spinal cord injuries, juvenile diabetes and the genetic disease "congenital hypogamma-globulinemia." From the 185 donated oocytes, endowed with the genetic material from a different person (or in one c...
U of MN researchers discover novel way estrogen affects the brain
...es related to learning and memory in the brains of female
rats and not males. While it has been well docume...for the well-documented actions of this hormone on female
motor control and pain sensation." Marissa Boulware, a University of Minnesota neuroscience graduat...
AAAS CEO Alan I. Leshner urges US to continue collecting job data on women workers
... continue the collection of employer job counts of female
workers, saying such data are crucial to understanding links between gender, income and productivity. In a letter to the Office of Management and Budget, Alan I. Leshner, chief executive officer of AAAS and executive publisher of the journal Science...
One gene links newborn neurons with those that die in diseases such as Alzheimer's
...t the scientists allowed male finches to sing to a female
before analyzing the birds' brain neurons. As predicted, the expression of UCHL1 in replaceable neurons, but not in nonreplaceable ones, increased in birds that were singing. "These findings suggest that rising levels of UCHL1 may be associated with ...
NexMed announces positive Femprox study results at American Urological Association Annual Meeting
...enopausal and post-menopausal women diagnosed with female
sexual arousal disorder ("FSAD"). Femprox is applied topically and incorporates alprostadil, a vasodilator, with the NexACT permeation technology. The results were announced at the Annual Meeting of the American Urological Association (AUA), Tuesda...
Study is first to show side-stream smoking is as damaging to IVF success as being a smoker
...ial to study the effects of cigarette smoke on the female
gamete. The damaging effects on sperm are well doc... more accessible and easier to study. Studying the female
gamete, on the other hand, is much more difficult since human ooctyes are precious. "Our study is un...
Double triumph in stem cell quest
...response was that he fused male adult cells with a female
ESC line, and the resulting cells were male. However, Verlinsky's team has not yet tested the HLA proteins on the cell surface to prove that the stembrids are an immune match for the adult donors. By contrast, Hwang's team has shown that the ESCs der...
Scientists journey to southern Africa to unravel the secret world of elephant communication
...d put a male planthopper on a stem and play back a female
call, and the male would do the same thing the elephants were doing: He would freeze, then press down on his legs, go forward a little bit, then freeze again. It was just so fascinating to me, and it's what got me to think maybe there's something els...
Harmful chemicals may reprogram gene response to estrogen
...y "reprogram" the way certain genes respond to the female
hormone estrogen. This genetic reprogramming may d...rs is due to DES' ability to influence estrogen, a female
hormone that is involved in promoting the growth of tumors by regulating the activity of key genes i...
Love's all in the brain: fMRI study shows strong, lateralized reward, not sex, drive
..."have reported that expressions of attraction in a female
prairie vole are associated with a 50% increase in dopamine activity in a brain region related to regions where we found activity. These and other data indicate that all mammals may feel attraction to specific partners, and that some of the same bra...
Non-dieters more successful at boosting health than dieters, study finds
...traditional dieting. The study started off with 78 female
participants ranging in age from 30 to 45 years old. Half were assigned to a dieting group and half to a non-dieting Health at Every Size group.Dieters and non-dieters Members of the dieting group were told to moderately restrict their food consumpti...
Other highlights in the June 1 JNCI
... versus 36%), but this risk was much greater among female
ATM mutation carriers than in the general female
population (35% versus 21%). There was also some evidence of an increased risk of colorectal cancer ...
Single gene is genetic switch for fly sexual behavior
A male fly's sexual courtship of a female
fly is a complicated business of tapping, singing,.... The gene encodes the Fruitless protein. Male and female
flies carry different versions of the fruitless protein, as a result of sex-specific splicing of the...
Dinosaur fossil bone leads to gender, age determinations
... highly vascular bone that is found in present-day female
birds only during ovulation. This estrogen-linked ...hells. Medullary bone is only found in present-day female
birds; no other egg-laying species including crocodiles, the other living dinosaur relative produc...
Study in Royal Society journal on heritability of female orgasm
Biology Letters Genetic influences on variation in female
orgasmic function: a twin study by Dr KM Dunn, Dr ...One possible explanation is a role for genes. 4037 female
twins from the TwinsUK register were surveyed confidentially about sexual problems. A sizeable gene...
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