Tag: "sexes" at biology news

Females may be more susceptible to overindulge 'sweet tooth' cravings than males

...chance to exercise, overeating was reduced in both sexes of rats, but the caloric intake reduction associated with the exercise was much less dramatic in the female rats, and unlike male rats, female rats exercised less when sweet foods were available than when sweet foods were not available. The resea...

Size does matter when choosing a mate

...nown, says that the ratio between the sizes of the sexes is related to body size with very few exceptions t...e difference in the ratio between the sizes of the sexes increases, explaining the changing ratios identified by Rensch. In contrast, in species with low int...

Sex-specific differences in gene expression related to drug metabolism and hypertension

...o look for molecular differences between mammalian sexes in multiple tissues. The researchers surveyed nea... "We looked for genes that were expressed in both sexes but significantly higher in one sex relative to the other and genes with expression detected only in...

More news in the battle between the sexes

...tion is beneficial. However, conflicts between the sexes are ubiquitous and could erode fitness. Although sexual conflict is widespread, its evolutionary consequences remain largely unknown. In the new study, which broadens our understanding of sexual selection and sexual conflict, Oliver Martin and David ...

Is a single bout of exercise helpful or harmful in getting a good night's sleep?

...w-fat meals are the staples of many diets and both sexes are now engaged in an exercise regimen. As evidence of the latter, marketing experts claim that membership growth in health and fitness club facilities will soon outpace capacity, with almost 12 percent of the population belonging to health clubs in ...

Young chimpanzees show sex differences in learning

...st systematic evidence of a difference between the sexes in the learning or imitation of a tool-use techniq...hing for termites than males do. The young of both sexes seem to pursue activities related to their adult sex roles at a very young age." Because this learni...

Ambient light influences the evolution of colour signals

... used in conspicuous signals to select mates. Both sexes present similar coloration at each height, but males display more conspicuous sexually selected patterns than females. Colours of light and background are also likely to influence the evolution of visual signals in other light-contrasted ecosystems....

A human hormone, combined with a full stomach, offers clues for understanding our food intake

...ts were made for each sex, separately and for both sexes together. In all analyses of intake and duration, ...enhanced the distension effect by an average (both sexes combined) of 73 g. Put another way, the CCK effect was 73 g greater with than without distension. Ho...

Research collaboration identifies gene essential to puberty

...rom Saudi Arabia in which many individuals of both sexes failed to undergo puberty. Analysis of blood samples from affected and unaffected family members first showed linkage of the disorder to an area on chromosome 19. The researchers finally found that the gene that codes for GPR54 was mutated in all th...

SPR Annual Meeting features newsworthy discoveries

...the uncaring male. Adding fodder to the war of the sexes are recent findings that men's and women's brains ...archers recorded electrical brain activity in both sexes while subjects listened to spoken sentences that sounded either happy or fearful. While both men and...

New study provides first linkage of fetal alcohol exposure and enlarged heart

...ncreased placental weight found in fetuses of both sexes in response to fetal alcohol exposure. This information garnered from this research could suggest a potential mechanism of alcohol-induced fetal programming of the cardiovascular system. Therefore, these groundbreaking experiments support the hypothe...

Sex-based and women's health research gain $150,000

...udy is to look at the XY and XX chromosomes in the sexes and determine if this genetic difference is responsible for the different drug-induced behavioral responses observed in female and male mice," she said. The second study was awarded $80,000 to examine the effect of estrogen on escitalopram treatment...

Sex matters in health promotion and disease prevention

...ifying how disease and their treatments affect the sexes differently, it is crucial that clinicians and health-promotion professionals translate these findings into tangible steps both men and women can take to improve their health," Greenberger said....

An old, familiar love nest helps sexual success

...emales, the same experiment was conducted with the sexes reversed. The rate of eggs fertilized was three times greater in cages where the females had previously been exposed to males, compared with those in cages where they had not previously encountered males. The findings could be relevant for breeding ...

Grape seed extract may be useful supplement to blunt hypertension in postmenopausal women

...t with increasing age, and at all ages and in both sexes it afflicts African-Americans more often than whites. Men with hypertension outnumber women with hypertension during young adulthood and early middle age, but hypertension rapidly increases in women after the age of menopause, and they soon outnumbe...

Potential blood test for colon cancer risk

...d other diseases may result. "It's a battle of the sexes inside the genome, and each gene copy encodes different instructions to the cell," Feinberg says. "When you have LOI of the IGF2 gene in colon cancer, the mother's gene copy gets turned on by mistake and the cell gets a double dose of abnormal cell ...

Researchers find blacks also have telltale protein but higher in osteoarthritis patients and men

...s, is naturally present in the different races and sexes could become a major tool for determining when the illness occurs and when it advances, said Jordan, also adjunct professor of epidemiology at the UNC School of Public Health. "We must take these differences into account. An African-American person, ...

Prehistoric tusks point to earliest fossil evidence of differences between sexes

...dimorphism - different physical traits between the sexes of the same species - in their study of fossils from between 252 to 260 million years ago. They believe that the male Diictodon, a herbivorous barrel-shaped creature, had two large tusks extending down from the upper jaw. The tusks, Reisz says, were ...

Female hormones found to protect against harmful effects of fructose

...sitivity, or if there were any differences between sexes in terms of insulin sensitivity. These findings ra...ure and insulin sensitivity simultaneously in both sexes of fructose-fed rats.) In both groups of intact female rats, the fructose diet failed to cause any...

Research shows less income, education not always top factors in child obesity

...ll study shows that is not uniformly true for both sexes and various ethnic-racial groups. "We found that overweight was lower among white girls from higher-income, better-educated families than among other white girls, but overweight did not similarly decrease with high income and education among black g...

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