Tag: "sex" at biology news
Facial attraction -- choice of sexual partner shaped the human face
...NE. The face holds the secret to determining the sex
of our ancestors and what makes us attractive to the opposite sex
for reproduction. According to palaeontologists at the Natural History Museum, men have evolved s...
Does the desire to consume alcohol and tobacco come from our genetic makeup?
...ted. Such studies have provided evidence that ones sex
can influence the genetic factors for alcohol and ...ion from the questionnaires, the researchers found sex
differences in prevalence of alcohol (17.3% in females and 38.3% in males) and tobacco (22.2% in fem...
Cardio exercise benefits in male vs. female hearts
... findings bring us a step closer to explaining the sex
bias in physical activity that protects the heart....
Female gender provides an advantage in renal diseases
...ed hormonal manipulation to explore the effects of sex
hormones on renal disease. In these studies, researchers either added supplemental levels of estrogen/testosterone to rats or castrated/performed ovariectomies in males and females rats, respectively. The studies found that estrogen helped to protect...
The 'female advantage' in kidney disease does not extend to diabetic women
...til they reach menopause. At menopause, when their sex
hormone -- estrogen -- begins to disappear from th...sent. Conclusion These findings suggest that sex
hormones play a significant role in the development of diabetic kidney disease. According to Maric, ...
Weed gave up sex long ago
...he findings show that at least in plant evolution, sex
with others may bemore trouble than its worth. T...d-like plant Arabidopsis thaliana lost interest in sex
and startedself-pollinating at least a million years ago, said plant geneticists led byMagnus Nordbo...
News tips from ACS Chemical Biology
...risk of cardiovascular side effects How the sex
hormones estrogen and testosterone activate cell signaling pathways Helper peptides that can influence the opening of calcium channels in cell membranes A new technique called the double barrel shotgun approach that helps pinpoint key ...
U-M researchers find family of 'on switches' that cause prostate cancer
...our of the genes are regulated by androgen, a male sex
hormone known to fuel prostate cancer. Androgen deprivation is a common therapy for prostate cancer. Knowing which gene fusion is involved in an individual patients tumor could impact treatment options. If an androgen-regulated gene is involved, an...
High rates of HIV infection documented among young Nepalese girls sex-trafficked to India
...es of HIV we have documented support concerns that sex
trafficking may be a significant factor in both ma...as perhaps the most critical health consequence of sex
trafficking, but sex-trafficked girls and women are rarely studied leaving the prevalence of HIV an...
Other highlights in the July 24 JNCI
...east cancer and those who did not. They found that sex
hormone levels and breast density are strongly and...reast cancer risk. Thus, levels of circulating sex
steroid hormones and mammographic density may increase breast cancer risk through different mechanis...
Researchers witness natural selection at work in dramatic comeback of male butterflies
...e selective pressures, such as an extremely skewed sex
ratio, evolution can happen very fast." The rese...antennae length, a genetic change that affects the sex
ratio of a population has a very wide impact on the biology of the species. It is not yet clear wh...
Double identities lie behind chromosome disorders
Chromosome disorders in sex
cells cause infertility, miscarriage and irregular...tics shows how chromosome disorders can arise when sex
cells are formed. Sex cells contain a control station for monitoring the mechanism that ensures t...
Sex in the morning or the evening?
...aily pattern of sexual activity in response to the sex
ratio of a population. Females solicit sex
in the evening in populations that are heavily female-biased, where sexual harassment by males is mi...
Electric fish conduct electric duets in aquatic courtship
... their surroundings and communicate their species, sex
and social status with other fish. It is also the first study to successfully sort signals in electric fish based on sex. The research, which is the cover story in the July 1 issue of the Journal of Experimental Biology, is authored by Carl D. Hopk...
Another sexual attraction is possible ...
...es' bright colours are examples of how an emitting sex
attracts conspecific members of the responding sex. Moth odours (pheromones), though less conspicuous for us humans, are also signals by which females guide males towards them, even on the darkest nights. Such mating recognition systems tend to be ve...
Older men may not live as long if they have low testosterone
... only the second report linking deficiency of this sex
hormone with increased death from all causes, over time, and the first to do so in relatively healthy men who are living in the community," said Gail Laughlin, Ph.D., assistant professor and study author. Laughlin will present the findings to The...
Bigger is smarter
...les, such as the fact that there are no consistent sex
differences in IQ, yet men generally have larger brains. And, of course, elephants and whales possess larger brains than we do, yet it's hard for us to imagine that they are smarter than we are."...
Latent memory of cells comes to life
...xample, can abruptly change from being of a single sex
to hermaphrodite. Researchers from the Niels Boh...stable, in that it could become either of a single sex
or hermaphrodite. The experiment showed that a spontaneous change occurred in the yeast cells about ...
From the deep -- Researchers find new species of sea anemone
...e reproduce (each anemone may have male and female sex
organs), or if it lives exclusively on whale carcasses. "So far, a single dead whale is the only place where we've found these anemones," Daly said. She and Gusmo plan to include A. pearseae in a long-term evolutionary study of genetic relationsh...
Testosterone may help men with multiple sclerosis
...ee women to one man. Voskuhl has long thought that sex
hormones and/or sex
chromosomes may be responsible for this enhanced susceptibility. And testosterone has been shown to ...
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