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Tag: "sex" at biology news
The penalty of having a sister -- why sibling sex matters for male saiga antelopes
...tists a new insight into the importance of sibling sex and what implications this may have for the animal...Future research will investigate what role sibling sex plays for lifetime reproductive success. The monitoring protocol of saiga antelopes is currently bei...Pitt study notes decline in male births in the US and Japan
...ne ?a gene on the Y chromosome that determines the sex of a fertilized egg. Other environmental factors t...etailed studies should be carried out that examine sex ratio in smaller groups with defined exposures as a potential indicator of environmental contaminati...The sturdier sex? -- Study by Pittsburgh scientists finds female stem cells work better
...ttsburgh School of Medicine. "Regardless of the sex of the host, the implantation of female stem cells...tigating regenerative medicine should consider the sex of the stem cells to be an important factor. Furthermore, investigations such as ours could lead to ...Male-killing bacteria makes female butterflies more promiscuous
...o females. The researchers assessed the natural sex ratio in 20 populations and combined this data wit...to find how female promiscuity was affected by the sex ratio. They found that the size of the Spermatophore was key to female promiscuity. However, female ...Brain's reward circuit activity ebbs and flows with a woman's hormonal cycle
Fluctuations in sex hormone levels during women's menstrual cycles aff...ogesterone are present. "These first pictures of sex hormones influencing reward-evoked brain activity in humans may provide insights into menstrual-rela...Latent memory of cells comes to life
...xample, can abruptly change from being of a single sex to hermaphrodite. Researchers from the Niels Bo...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 Gusmão plan to include A. pearseae in a long-term evolutionary study of genetic relatio...Female-led infanticide in wild chimpanzees
...r, but may stem from demographic shifts that alter sex ratios and put increased pressure on females compe...on changes resulted in a highly skewed male:female sex ratio of 1:3, with relatively few males available to increase the home range. According to the au...Hearts of male and female rainbow trout are different
...de. There is a growing appreciation of significant sex differences in cardiac characteristics and functio... to close the gender gap in fishes, and finds that sex differences in cardiac performance and metabolism exist in rainbow trout. These differences occur at...Male circumcision overstated as prevention tool against AIDS
...rus themselves, and because of the large number of sex partners they have each year, can act as an engine...e virus home to their villages, their other casual sex partners and to their wives. The study has important policy implications. Several international A...... 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. Hop...Other Tagsclearance 2clearance 3connect 2connect 3connect 4optimistic 2optimistic 3optimistic 4optimistic 5optimistic 6antigen 2antigen 3antigen 4antigen 5bovine 2
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Other Contentstrainingtrainingtrainingtrainingtrainingtrainingtrainingtrainingscientistscientistscientistscientistscientistscientistwritingwritingwritingwritingwritingwritingneurobiologicalneurobiologicalneurobiologicalliveliveliveliveliveliveliveliveliveliveatrophyatrophyatrophy[0] Statement of HDMA President and CEO John M. Gray on the Importation of Prescription Drugs[0] Ceridian Web Forum to Prepare Employers for Health Care Reform[0] You Never Get a Second Chance to Make a First Impression: High-Definition for the Web [0] Allegheny Medical Achieves Remarkable Success with Their Fibromyalgia Flow Care Plan [0] Study highlights implications of influenza pandemics on blood supplies
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