Tag: "sex" at biology news
Finally, male water fleas exposed
...tacean juvenile hormone that is known to determine sex
in some species that regularly produce males. The researchers found that the MF exposure caused the production of males in different families of water fleas, despite the fact that they were only distantly related to each other and despite the fact th...
Study in Royal Society journal on link between creativity and mating success
...oup exploration' view accounts for the prevalence, sex
& age distribution, severity distribution, and heterogeneity of ADHD. Contact: Dr JOH Williams, Child & Adolescent Psychiatry, Institute of Psychiatry, De Crespigny Park, LONDON Nanoprinting onto cells by Professor SG Curtis, Dr M Dalby and Dr N Gad...
Chronic stress might harm women more than it does men
... Figueriedo, is to determine the specific roles of sex
hormones and the menstrual cycle in chronic-stress response. "Understanding how the stress response is handled differently between males and females is a major goal for the development of 'female-sensitive' drugs," said Dr. Figueriedo....
Seasonal depression, anxiety affects hamsters, study finds
...behavior and depressive-like behaviors (with a few sex
differences) compared to those exposed to long days. In general, the results showed that female hamsters showed more evidence of depression than males, which corresponds to research in humans which shows more depression among women than men. Previo...
Other highlights in the November 16 JNCI
...indings have also been inconclusive with regard to sex
and colorectal subsite. To resolve these inconsist... and colorectal cancer incidence did not differ by sex
or by cancer subsite. Diabetes was also positively associated with colorectal cancer mortality, but ...
The brain is broadly wired for reproduction
...le mouse brains. However, there were some telltale sex
differences in the circuitry, which offer important new pathways for investigating differences in male and female reproductive physiology and behavior, Buck said. Although it is still early, the researchers suspect that the findings in mice could ha...
ECCO 13 - Chernobyl legacy sheds light on link between thyroid cancer and radiation exposure
...e split into four groups matched according to age, sex
and place of residence. Two groups of 13 cases were from the areas of Ukraine most heavily contaminated with radioiodine one group of 13 born before the accident and the other born after the 1st January 1997, and therefore spared exposure to radioio...
Missouri genetic disorder's roots untangled by international team
...sm (XLHPT): a portion of the X chromosome, a human sex
chromosome, has been removed and replaced by a copy of a much larger section of genetic material from chromosome 2. Alterations of such large regions of genetic code that stably pass from one generation to the next are generally rare and have never b...
NHGRI's large-scale sequencing research network sets its sights on disease targets
...somes, plus a non-matching pair referred to as the sex
chromosomes. The sex
chromosomes, which are called X and Y, determine whether a person is female (XX) or male (XY). Any d...
Seaweed yields new compounds with pharmaceutical potential
...roduction of chemical cues, such as those used for sex
recognition." Hay, Kubanek, and their colleagues collected baseball-sized samples of reef species that exhibit unusual growth and/or behavioral phenomena. Among their collection were soft corals, marine sponges, slugs, and green, red and brown seawe...
Double trouble: Cells with duplicate genomes can trigger tumors
...female. Tetraploid cells contain 44 pairs plus the sex
chromosomes. "Our experiments test an idea that's been percolating along among cell biologists for many years but was never really embraced by the cancer community," says Pellman. "We set up this experiment to test it in a real cancer setting." A co...
Brain regulates initial stages of sex change in social fish
ATLANTA - While changing sex
from female to male, the highly social bluebanded ... The finding, which suggests the initial stages of sex
change in fish are regulated in the brain, could help better explain the biological basis of human s...
Same-sex mating by fungi spawned infection outbreak, evidence suggests
..., which began in 1999. Moreover, the evidence that sex
played an important role in the pathogen's expansi...etween two less harmful fungal strains of the same sex
or "mating type" produced the more virulent form. That strain has now taken hold and appears to be s...
New GM mosquito sexing technique is step towards malaria control, report scientists
...erent sexes quickly. By providing a way to quickly sex
mosquitoes, the advance paves the way for pooling ...ling several insect pests when methods for sorting sex
are available. "Female mosquitoes are responsible for spreading malaria, and also for damage to crop...
Queen's contraception awareness program among world's top five
... to submitted questions about contraception, safer sex
practices, and sexual well-being. Created in response to the growing number of sexually transmitted infections among young people and the unacceptably high rate of unintended pregnancies in Canada, sexualityandu.ca is part of a Contraception Awarenes...
Leading lampreys to slaughter: Pheromone for scourge of Great Lakes identified
... trails. After arriving at the spawning grounds, a sex
pheromone -- which was identified by Weiming Li, an earlier doctoral student of Sorensen -- attracts the females to males. After spawning, which takes a few weeks, the adults die. It has taken Sorensen and his colleagues about 15 years to find, i...
Pregnant women at higher risk for HIV, Uganda study finds
... HIV acquisition during pregnancy and promote safe sex
or sexual abstinence where feasible." The study supports the findings of two previous studies that reported a greater risk of acquiring HIV during pregnancy than after delivery. However, neither study accounted for risk factors that contribute to HIV...
Hanging baskets of sex and death help fruit growers
...chers at the University of Warwick to harness the sex
drive of a major pest of fruit orchards as a weapon to spread a virus to kill that very same pest. The device allows growers to selectively target the pest with a virus that kills its larvae without killing other beneficial insects. The research...
Acute-leukemia sign may signal need for different therapy
... are compared with each other and when ethnicity, sex
and other chromosome changes are considered patients with the 8;21 abnormality fare significantly worse than do patients with inversion 16 when they receive similar therapy. Furthermore, the researchers were surprised to find that nonwhite AML pati...
Human Y chromosome preserves itself better than the chimp Y
...directly. Evidence suggests, too, that the X and Y sex
chromosomes became separate and distinct from the autosomes, the other type of chromosomes, about 300 million years ago. Unlike the autosomes, the X and Y do not pair up and exchange genes during reproduction. As a result, the Y chromosome remains es...
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