Tag: "female" at biology news
Researchers piece together the puzzle of Hailey-Hailey skin disease
...lated skin cells from severely affected areas of a female
patient and found that skin cells from patterned skins lesions possessed a defect in the gene ATP2C1, which encodes a calcium pump protein, present on the chromosome derived from the patients mother. Normally, the chromosome obtained from the father ...
Low-carb diet during pregnancy improved triglycerides, fat metabolism in offspring
... of Southampton School of Medicine have found that female
pups born to mice who were fed a diet high in unsa...n the standard chow diet (high-carb/low-fat). The female
low-carb/high-fat offspring also had higher amounts of proteins that aid fatty acid oxidation (fat b...
What women want makes a difference
... two new loci that influence the likelihood that a female
will choose to mate with a male of her own species...scriminating as their mothers, they concluded that female
mating discrimination is inherited as a dominant trait. They further show that genes responsible for...
Studies in Royal Society journals include stress in birds and depletion of medieval fish stocks
... evaluate males. We investigated the preference of female
field crickets for carrier frequency and chirp rat... the reddest males, supporting the hypothesis that female
choice is important in cichlid diversification. Contact: Dr ME Mann, Department of Animal Ecology, I...
Study in Royal Society journal on possible genetic factors in social responsiblity
...differences in the genetic load affecting male and female
fertility in a butterfly by Dr IJ Saccheri, Dr HD ... the sterility effect is restricted to males, with female
fertility being unaffected by inbreeding, suggesting that spermatogenesis is more sensitive to delet...
UCSD biologists identify gene in corn plants that may have paved way for development of maize
...es. In maize, these secondary branches include the female
reproductive parts of the plant--or ears of corn--and the male reproductive organ, or tassel, the multiple branched crown at the top of the plant. Teosinte has numerous tassels and tiny ears in its highly branched architecture, while maize ...
JCI table of contents, December 1 2004
...ransplanted BM-SP cells from normal male mice into female
mice lacking delta-sarcoglycan an animal model of...from male donor cells present within the recipient female
muscle), these donor cells were only able to restore sarcoglycan expression in 2 muscle fibers. This...
Efforts to clone primates move forward
...nor nucleus is transferred into a living surrogate female
in an attempt to make a successful pregnancy. Stem...key embryos and transferred them into 25 surrogate female
rhesus macaques. No pregnancies were established. University of Pittsburgh researchers' success in a...
NC State gets $1.59M grant to map genome of parasitic worm
...plant where water and nutrients are transported. A female
root-knot nematode will then become sedentary and produce as many as 1,000 eggs in 30 days, which will hatch and re-infect the roots. So you can have multiple generations infecting plants in one season," Opperman says. Above ground, infected plants ...
Chicken genome analysis unlocks secrets of mammalian and bird evolution
...rst draft sequencing project was a Red Jungle Fowl female
from an inbred line that was developed in the 1950s at UC Davis by geneticist and breeder Hans Ablanalp, a professor emeritus of avian science. The Red Jungle Fowl is the ancestral species of all domestic chicken breeds. Delany notes that the hen, wh...
Chicken genome analysis will benefit human health and agriculture
...e species from which all domestic chickens came. A female
was chosen because female
birds contain a sex chromosome (called W) that male birds lack. She also provided DNA used to create...
Study in Royal Society journal on first evidence for magnetic field detection in sharks
...aits determine mating success? Differential use in female
choice and male competition in a water boatman by ...that different traits serve different functions in female
choice and male-male competition. In a water boatman Sigara falleni, traits determined at distinct l...
New model of rare childhood blindness holds promise for testing preventive therapies
...ting the gene. The embryos were then inserted into female
mice that gave birth to mice with this genetic defect. Using a variety of laboratory methods to study retinal cells, the team showed that AIPL1-deficiency causes severe retinal degeneration beginning around the second week of life in affe...
Solving the mechanism of Rett Syndrome
...stating neurological disease affects one in 15,000 female
children. Just five years ago, Rett Syndrome was tracked to mutations in a gene on the X chromosome, MECP2. But how this gene, not previously associated with the brain or nervous system, could cause a neurological developmental disorder remained a ...
'Casanova' field crickets - live fast, die young
...The well-fed males also died earlier than well-fed female
crickets (females don't "call" to males). The scie...literally knocked themselves out trying to impress female
crickets," he says. "For humans this might seems counterproductive because we don't want to die you...
Ants' 'genetic engineering' leads to species interdependency
... all ant species, it is the environment in which a female
is raised, rather than a genetic predisposition, that determines which caste she will adopt. However, in two harvester ant populations in southern New Mexico, queens and workers from the same colonies are genetically very different; in both species a...
Highlights of January 2005 issue of Biology of Reproduction
...uzzle why embryos from most random-bred and inbred female
mice exhibit a block at the 2-cell stage in classi... the phenotype is dependent on the genotype of the female
giving rise to the egg - there are "blocking" and "non-blocking" types of females. In the January 20...
Zebrafish may hold key to understanding human nerve cell development
...ces of gene defects in the 200 to 300 embryos each female
fish produces," she said. By studying these mutant embryos, Piotrowski and her colleagues discovered that during development the zebrafish is "seeded" with future hair cells through a process known as placode migration. These precursor cells, cal...
An invasion of cheats: The evolution of worthless nuptial gifts
...ny species. By manipulating the nuptial gifts that female
insects receive during copulation, researchers have now shown that female
preferences can be exploited by males who are "cheating" on their reproductive investment by present...
Unusual reproductive behavior of odd ants surprises scientists
...ence whether larvae develop into queens or sterile female
workers, said Steve Rissing, a professor of evolut...f harvester ants, hundreds or thousands of sterile female
workers (worker ants are always female
and, with a few exceptions, sterile. Soldier ants are larger ...
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