Articles with the keyword: 
Pollutants in the womb can trigger cancers in adult mice
sea-maid submitted, created time 4 weeks 17 hours (www.sciencenews.org)
Mouse moms exposed late in pregnancy to heavy doses of a carcinogen gave birth to pups that inevitably developed lymphomas and lung cancers, a new study shows. The malignancies generally didn’t show up until the offspring reached the human equivalent of adulthood. The good news: Breast milk from carcinogen-treated moms posed little added risk.
This demonstration “that very short early-life exposures can have major consequences is very important,” observes toxicologist Linda S. Birnbaum of the Environmental Protection Agency in Research Triangle Park, N.C.
In 2006, David E 
LlLIM1 mediates Ca and H regulation of actin dynamics in pollen tubes
kavin submitted, created time 7 months 2 weeks (www.ncbi.nlm.nih.gov)
The researchers explored the function of a lily (Lilium longiflorum) pollen-enriched LIM-domain-containing protein, LlLIM1, in regulating the actin dynamics in elongating pollen tube. Co-sedimentation assays revealed that the binding affinity of LlLIM1 to F-actin was simultaneously regulated both by pH and Ca(2+): LlLIM1 showed a preference for F-actin binding under low pH and low Ca(2+) concentration.
Ultrasonic frogs show hyperacute phonotaxis to female courtship calls
kavin submitted, created time 7 months 3 weeks (www.ncbi.nlm.nih.gov)
Here the authors show that before ovulation, gravid females of O. tormota emit calls that are distinct from males' advertisement calls, having higher fundamental frequencies and harmonics and shorter call duration. In the field and in a quiet, darkened indoor arena, these female calls evoke vocalizations and extraordinarily precise positive phonotaxis (a localization error of
Gene Studies Tell Placenta's Tale
Eric wu submitted, created time 8 months 2 weeks (sciencenow.sciencemag.org)
When it comes to pregnancy, mice and elephants couldn't be more different: A mouse mom births a dozen pups in less than a month, whereas it takes an elephant about two years to produce a single calf. A well-adapted placenta makes this diversity possible. Now, a new genetic study is shedding light on how this important organ evolved--and how it became fine-tuned to meet the specific reproductive needs of mice, elephants and humans.
The Case of the Half-Blood Bug
davidd submitted, created time 8 months 4 weeks (sciencenow.sciencemag.org)
The ubiquitous microbes have such a messy family tree--with various types of sexual reproduction and genes jumping between distantly related bacteria--that the very concept of a microbial species is in doubt. Now, a genetic study of the microbes predicts that some bacteria will "despeciate."
Is DNA Repair a Substitute for Sex?
Sue Wu submitted, created time 9 months 21 hours (www.a2mediagroup.com)
Birds and bees may do it, but the microscopic animals called bdelloid rotifers seem to get along just fine without sex, thank you. What's more, they have done so over millions of years of evolution, resulting in at least 370 species.
How sperm and egg fuse into one could have applications in antiparasitics
jane2007 submitted, created time 9 months 1 week (www.nature.com)
How do sperm and egg fuse into one? A protein called HAP2 is involved with the fusion of egg and sperm in a wide range of species. This fusion protein could be targeted to stop parasites from reproducing.
Why Your Fertility Cells Must Have Radio Silence
Eric wu submitted, created time 11 months 1 week (www.sciencedaily.com)
Researchers in Kobe, Japan, and Montreal, Canada, have uncovered a previously unknown mechanism which causes embryonic germ cells -- which later develop into sperm or ova -- to go through a period of "transcriptional silence," during which information from the cell's DNA cannot be copied. Without this important phase, unique to cells of this type, an organism produces sterile offspring.
Air pollution causes sperm mutations
jane2007 submitted, created time 11 months 3 weeks (www.nature.com)
After reared mice in cages kept in a shed downwind of two steel mills and a busy highway in a Canadian city, researchers have found that air pollution can cause DNA mutations in the sperm of the mice. DNA in the sperm of the mice contained 60% more mutations, had more strand breaks, and had more bases that had been chemically modified via the addition of a methyl group. Air pollution will arrect human health and fertility.
jane2007 submitted, created time 11 months 4 weeks (www.nature.com)
Researchers have found that embryos of C. elegans unlucky enough to be missing one particular gene, called zeel-1, die early in development if their male parent delivered a metaphorical bomb into their embryotic life in the form of a compound produced from an incompatible version of another gene, peel-1, in his sperm.
In Horse Breeding, Genes Aren't Always a Good Bet
Eric wu submitted, created time 1 year 2 weeks (sciencenow.sciencemag.org)
When it comes to success on the racetrack, nurture beats nature by a mile, new research suggests. A Scottish team has found that horse breeders who pay the highest stud fees to mate their mares with popular stallions--hoping to cash in on the bloodlines of a champion--won't necessary make out any better in the winner's circle.
Voyeurs put male fish off their ideal mate
snoopy submitted, created time 1 year 1 month (technology.newscientist.com)
An interesting research was carried out by some researchers these days. That says mating fish don't like an audience. If there’s another male spying on them, they change their mind about which female they prefer.
Researcher Plath thinks that fishes act like this to avoid sperm competition. Another possible explanation would be that the desire to fight a competitor distracts the very fishes from their true mate preference, although Plath considers this less likely
Samuel L. Leonard, Cornell Zoologist, Dies at 101
yangjane submitted, created time 1 year 1 month (www.nytimes.com)
Samuel L. Leonard, a zoologist at Cornell University whose studies of reproductive hormones in animals helped prepare the foundation for in vitro fertilization in women, died on Nov. 11 in Ithaca, N.Y. He was 101.
His family confirmed his death.
So Cute You Could Just Eat Them Up
Eric wu submitted, created time 1 year 1 month (sciencenow.sciencemag.org)
Most likely, your mother nurtured you for years and you never worried that when you came home from kindergarten, she'd gobble you up. But many animals do occasionally eat their young, including many that also are attentive parents. New research indicates that, when it comes to deciding whether to chow down on junior, Ma and Pa may be motivated by more than hunger. For example, parents may selectively eat their weaker offspring to favor the stronger ones, an evolutionary model predicts.
Bond to a "Mother" from a Different Species
jane2007 submitted, created time 1 year 1 month (www.sciam.com)
Recognizing and bonding with a parent are more dependent on exposure and learning than on a genetically programmed response, it's conceivable that any animal exposed exclusively to a member of a different species might happily call it mom—witness the children purportedly raised by wolves in India and the orphaned chipmunk adopted by Buffy the Chihuahua as well as a tiger in Thailand's Sriracha Tiger Zoo suckling piglets—after being suckled as a cub herself by, naturally, a pig
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