Tag: "female" at biology news
Rodent social behavior encoded in junk DNA
...ry bulb and lateral septum). They also checked out female
odors and greeted strangers more readily and were more apt to form pair bonds and nurture their young. "If you think of brain circuits as locked rooms, the vasopressin receptor as a lock on the door, and vasopressin as the key that fits it, only thos...
GroPep infertility data presented at US meeting
...g PV903 halved the miscarriage rate in a strain of female
mice susceptible to the immune rejection of the foetus (a suspected major cause of recurrent miscarriage in women). Scientists believe that women who suffer from repeated miscarriage have an immune system that attacks the embryo as "foreign" in the ...
Pediatricians lack confidence in managing obesity, and their own weight might be an important factor
...iatricians were nearly four times more likely than female
pediatricians to misclassify their own weight as not excessive when they actually were overweight," she said. "Those who called themselves thin had nearly six times the likelihood of reporting counseling difficulty as a result of their weight than th...
Genes exert powerful effect on sexual behavior
...as shown that the manipulation of a single gene in female
fruit flies can make their sexual behavior resembl...ene "fruitless," which is present in both male and female
fruit flies and some other insect species. Ordinarily, only in males does this gene result in the cr...
Geneticists identify 'master switch' that causes female flies to behave like males
Turning on a single male-specific gene produces a female
fruit fly that displays male courtship behaviors: ...ale courtship ritual you could physically expect a female
fly to do,'' says Bruce S. Baker, the Dr. Morris Herzstein Professor in Biology at Stanford and co-a...
Why being a teenage mum could be good for you!
...reeding." Earlier research by Dr Moore showed that female
dusky roaches that were prevented from mating did ...s a natural biochemical reaction is to blame. "The female
cockroaches reach sexual maturity at six days but we delay mating by two weeks. Adults live for abou...
Women, space travel and infection: Bed-rest study investigates female immune response
HOUSTON (June 16, 2005) A bed-rest study with female
participants will help scientists understand chang...w York. The study involves 24 healthy, non-smoking female
volunteers between the ages of 25 and 40. Candidates in the first phase came from the Czech Republi...
Gifts from the sea
...ea urchin (Strongylocentrotus droebachiensis): The female
sea urchin can produce as many as a half million eggs during spawning season, and fertilization and embryonic development are external and rapid. Such factors make this research organism ideal for the study of reproduction and development. Sea urchin...
UC San Diego undergraduates do cyberinfrastructure research in Asia, Australia
...ur host countries, and the program is drawing more female
students. Thirteen students - five of them women - fly next week from the United States to their respective host sites in Australia, Japan, Taiwan and China, the newest site. The students are part of a pilot program at UCSD called Pacific Rim Undergr...
World first: Scientists succeed in cloning human embryos from eggs matured in the lab
... In normal fertilisation the formation of male and female
pronuclei is an important stage just before the maternal and paternal chromosomes start to pair up in preparation for the first cell division. In the case of these oocytes they had undergone a pseudo-fertilisation because the pronuclei were derived ...
Eggs from embryonic stem cells could benefit sterile women
...tive cells, they spontaneously differentiated into female
reproductive cells even though they were originated from male ES cells."...
Tufts researchers shine light on firefly mysteries
...ale fireflies lying in order to find romance? "If female
mate choice is adaptive, we would expect that the ...n-doctoral student Christopher Cratsley found that female
fireflies of one species (Photinus ignitus) are strongly attracted to males who give longer flashes ...
Damage to sperm DNA affects older men's chances of fathering children
...women", he said, "and the combination of increased female
factor infertility, increased sperm DNA damage, low levels of DNA repair, and increased abnormalities in conventional semen parameters present in this population will have a pronounced impact on their reproductive potential." Dr. Moskovtsev and his t...
Environmental chemical cocktail may sabotage sperm
...ad shown that certain chemicals known to mimic the female
sex hormone, oestrogen, could individually affect ... more likely to affect sperm when they reached the female
tract where they would be preparing to fertilise eggs. "Maternal exposure to the compounds is probab...
Pomegranate juice for moms may help babies resist brain injury
...e and anti-aging effects. Scientists gave pregnant female
mice water with pomegranate juice, plain water, sugar water or vitamin C water to drink during the last third of pregnancy and while they suckled their pups for seven days after birth. After performing the procedures that exposed mouse pups to low ox...
Study in Royal Society journal on holly as an indicator of climate change
...genetic sexing. Steroid concentrations of male and female
eggs were not different in unincubated eggs, but w...4853-2702, USA The multiple signals assessed by female
satin bowerbirds: are they used to narrow down females' choices of mates? by Dr TE Robson, Dr AW Gol...
Female butterflies go for sparkle -- not size -- when choosing to mate
...e of the eyespots on a male butterfly's wings when female
butterflies consider potential mates. Instead, fe...ger eyespots might be considered more desirable by female
butterflies. The purpose of the research was to explore some of the evolutionary reasons behind but...
Unlike other mammals, newborn dolphins and orcas stay active 24/7 during first months of development
...ing without sleep." Researchers observed two adult female
killer whales and their calves at Shamu Stadium at SeaWorld San Diego and four dolphins and their calves housed at the Gelendgick Dolphinarium and the Utrish Marine Mammal Research Station in the Black Sea region of Russia....
Costly breeding programs for endangered species pay off
...lines were founded by just five pairs of males and female
flies. Moreover, because flies lay many eggs, and ...ess of the pair by counting the number of eggs the female
laid, and by measuring the number of eggs that hatched. In the MAI breeding scheme, brothers and sis...
Fighting malaria by manipulating mosquitoes' sense of smell
...ounds that interact strongly with receptors in the female
mosquito's antennae and appear to be related to host selection. The most promising of these mixtures will be shipped to Wageningen University where their effects on the behavior of live mosquitoes will be determined. Compounds that pass the behaviora...
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