Tag: "sex" at biology news
Designer babies - what would you do for a 'healthy' baby?
...tual characteristics as desirable depending on the sex
of the child. Older women and childless women are significantly more willing to "improve" the physical, social and intellectual characteristics of prospective children? (This can be explained by women seeking to increase their genetic heredity, parti...
JCI table of contents: September 1, 2006
...turally maintained by a group of hormones known as sex
hormones (for example, estrogen). However, unnaturally high levels of these hormones cause cancer of the reproductive organs and breast tissue, meaning that they cannot be used to treat individuals with osteoporosis. So, researchers have long been se...
What's shaped like a pear and has two genomes? Check the pond
...nucleus, the "micronuclear" genome is reserved for sex
and reproduction, remaining genetically silent during growth. Inside the second, working nucleus is the "macronuclear" genome, which expresses genes that govern behavior. The current study sequenced the macronuclear genome, an impressively package...
First 'encyclopedia' of nuclear receptors reveals organisms' focus on sex, food
DALLAS Aug. 25, 2006 Organisms thrive on sex
and food, and so do their cells' receptors. In c...oduction and metabolism. So it really is all about sex
and food. "The power of this analysis is highlighting such receptor associations that may predict...
Cat parasite may affect cultural traits in human populations
... the 'neurotic' cultural dimensions of 'masculine' sex
roles and uncertainty avoidance. "There could be a lot more to this story. Different responses to the parasite by men and women could lead to many additional cultural effects that are, as yet, difficult to analyze," said Lafferty. Lafferty sugges...
Transmission rates of vCJD
...s well as in the "neurotic" cultural dimensions of sex
roles and uncertainty avoidance. Spurious or non-causal correlations between aggregate personality and aspects of climate and culture that influence T. gondii transmission could also drive these patterns. A link between culture and T. gondii hypoth...
Special Science issue examines HIV/AIDS in Latin America and the Caribbean
...ies, shooting galleries, ministries of health, gay sex
clubs, universities, slums, migrant way stations, ... injecting drug users, today HIV mainly spreads by sex
between men and women, who now have nearly the same new infection rate. By 2005, the HIV prevalence ...
Early fetal gender test demands rapid ethical policymaking
...al gender demands rapid ethical policy-making. The sex
of a 5-7 week embryo can be determined by a new te...human life. Will easier access to more effective sex
selection affect gender balance? Probably not. Increasing ease of travel to countries with lax rules...
Erectile dysfunction: Incidence rate linked to type and severity of coronary artery disease
...ners) to seek help early. Just as there is more to sex
than an erect penis, there is more to ED prevention than simply restoring an erection."...
Study confirms males/females use different parts of brain in language & visuospatial tasks
...d benchmark to use in comparing whether underlying sex
differences also exist in all children. Such an i... the way towards understanding the extent to which sex
differences are developmental, sociological and/or hormonal and which differences may become more, o...
Flying in tune: Buzz brings mosquito pairs together
...d-flight pre-mating duets that serve as a means of sex
recognition. The findings are reported in the July 12th issue of Current Biology by Gabriella Gibson of the Natural Resources Institute at the University of Greenwich and Ian Russell of the University of Sussex. It has been known for decades tha...
UCLA study finds same genes act differently in males and females
...el, the only difference between the genders is the sex
chromosomes," said Drake. "Out of the more than 30,000 genes that make up the human genome, the X and Y chromosomes account for less than 2 percent of the body's genes. But when we looked at the gene expression in these four tissues, more than half...
'Big Brother' eyes encourage honesty, study shows
...d images of eyes. The eye pictures varied in the sex
and head orientation but were all chosen so that the eyes were looking directly at the observer. Each week the research team recorded the total amount of money collected and the volume of milk consumed as this was considered to be the best index avai...
Leading stem cell expert moves to UK
...ew type of stem cell from adult mouse testes (male sex
glands), called spermatagonial stem cells. The team published its results in the top international scientific journal, Nature, in April. It was able to show that some of these stem cells, called multipotent adult germline stem cells (maGSCs), turned...
Chromosomal abnormalities in sperm higher after vasectomy reversal
...f chromosomes unlike most cells in the body, the sex
cells should only contain one set of chromosomes. ...me interval after vasectomy reversal and the total sex
chromosome aneuploidy rate i.e. the long ago the reversal the better the chances of producing norma...
Nutrition a major factor in rise in twin pregnancies
...irth statistics from 1920 to 2003 to determine the sex
of babies at birth among multiple pregnancies. Th...e involved and half the twins will be of different sex
- was relatively constant from 1920 until the 1960s, but there was then the well-known dramatic incr...
Teenage and 60-year-old mums are consequences of evolution
...Before society criticises teenage girls for having sex
behind the bike sheds and becoming pregnant, or wo...refore, before we condemn our teenagers for having sex
behind the bike sheds and becoming pregnant, we should remember that this is a natural response by t...
Race plays a key role in prostate cancer survival rates
...sts. Hormone therapy blocks the action of the male sex
hormones that help the cancer cells grow, either through administering testosterone lowering drugs or by removing the testosterone-producing testicles. None of the study subjects had received definitive surgical or radiation therapy. Five factors we...
Female birds boost up their eggs when hearing sexy song
...gbirds can alter the size of eggs and possibly the sex
of their chicks according to how they perceive the...in the experiment there was no difference in brood sex
ratio between the different songs played to the females, which suggests different levels of female c...
Drinking or playing? Men's health and masculinity
...y and use illegal drugs, to engage in risky casual sex
and to be to be killed or injured in road traffic accidents. This research shows that understanding the desire to appear masculine may hold the potential to reduce such unhealthy behaviour "If these findings are used effectively," says Dr de Visser, ...
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