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Tag: "eggs" at biology news

FSU biologists uncover mechanisms that shape cells for better or worse

...'s proper functioning. Their findings in fruit fly eggs may help to clarify how muscular dystrophy and some cancers develop in humans. That's because many of the genes involved in the cell-to-cell communication that triggers the development of cell polarity in Drosophila oocytes (unfertilized fruit fly ...

With few factors, adult cells take on character of embryonic stem cells

...Those findings provided evidence that unfertilized eggs and embryonic stem cells contain factors that can confer pluripotency to differentiated cells, Yamanaka said. "We hypothesized that the factors that play important roles in the maintenance of embryonic stem cell identity also play pivotal roles in ...

Study finds how organs monitor themselves during early development

...the ovary, the egg on its own would not ripen. The eggs need this environment for their development, she says. In every organism, both egg and sperm cells cannot develop unless they are embedded in a matrix of somatic cells, says Dr. Lehmann. Interactions of somatic cells and germ cells are of central...

Parasitic worms used to fight bowel disease

... shown that giving humans a concoction of whipworm eggs and Gatorade is very effective in treating inflammatory bowel disease. Mansfield and colleagues are using some of the NIH funding to develop an animal model to test the effectiveness of the worms on inflammatory bowel disease and other maladies. Als...

Better beetle sought for salt cedar control

... ourlab at Bushland. We want to determine how many eggs they lay, the lifecycle times and how many batches of eggs they lay in a lifetime." Damage is what the researchers want to start seeing, Carney said. ThePosid...

Study shows hope for ridding lakes of clawed invader

...e body of water after another and scooping up fish eggs like so much caviar. But the clawed invader, the early results of a long-term University of Wisconsin-Madison study suggest, may be vulnerable to a "double whammy" of intensive trapping and predator fish manipulation to the point where it may actua...

One big biology question solved

...osis. The cells that eventually turn into either eggs or sperm ?known as germ cells ?are identical in ma...id. "In females, meiosis begins before birth and eggs are produced, whereas in males, meiosis begins after birth and the result is sperm." Professor Koo...

'Scent of a woman' tells male redback spiders to find a mate

...b. The female, who produces a batch of 100 to 300 eggs every month, will mate with only one or two males, and the first male will get up to 90 to 100 per cent of the fertilization for that female. "This provides a really good explanation for why there is so much size variation [among males] in the wild,"...

US woman gives birth to baby from world's first frozen donor egg bank

...ver, the technology to successfully freeze women's eggs did not exist until recently, prompting Cryo Eggs ...ernational (CEI) to open its doors and offer donor eggs to infertile patients who wish to create the family they have been longing for. Women select a famil...

How to grow a bigger brain

...of Experimental Biology. Wild steelhead lay their eggs in gravel nests on the riverbed. After hatching, the fry, called alevins, stay among the gravel and live off their yolk sac until they emerge as free-swimming fry. In hatcheries, the fish are reared in tanks of clean, well-aerated water, but without ...

Vital ocean prey play active role in environment

...cess to open-water food supplies. Females carrying eggs move offshore to deep water to spawn, where the embryos sink. The embryos hatch into free-swimming larvae at depth, then swim upward over the course of several weeks. The larvae are at this stage dependent on microorganisms found on the underside of ...

Leave it to salmon to leave no stone unturned

...cerned about all that. She simply wants to lay her eggs in a nice, gravel-bottom bowl that's free of fine sediments that can smother them. But consider the efforts of the grand dames of the salmon world, the female chinook ?or king ?salmon. The largest females are more than a yard long and tip the scales...

Exotic crab poised for widespread UK invasion

...ecies such as the white-clawed crayfish and salmon eggs and fry. They also settle in river banks, burrowing into them and riddling them with bore holes up to half a metre long which may eventually cause the bank to collapse. The Newcastle University study, published in the academic journal Biological I...

African amphibians make extreme parental sacrifice: The skin off their backs

... taitanus and S. annulatus belong---some lay yolky eggs and tend them until they hatch but invest no energy in feeding the young after hatching; others bear live young that fend for themselves after birth. In those that bear live young, fetuses are equipped with specialized teeth---something like those o...

Researchers now able to look deep into heart to view triggers of a heart's beat

...sual mechanism for sex determination: Unfertilized eggs develop into males, while fertilized eggs become females. But the development of an unfertilized egg into an adult (called parthenogenesis) re...

Insects that produce males from unfertilized eggs reveal a surprising cellular feat

...sual mechanism for sex determination: Unfertilized eggs develop into males, while fertilized eggs become females. But the development of an unfertilized egg into an adult (called parthenogenesis) re...

Scientists discover a genetic switch that links animal growth and cancer

...food is absent. If these animals hatch from their eggs without any source of nutrition, they are able to remain in a perpetually young state for a long time without growing. When they eventually find food they start growing and maturing into adults. The researchers discovered that this juvenile-to-adult ...

Single microRNA causes cancer in transgenic mouse

...hancer, to promote its expression, into fertilized eggs inside a pregnant mouse. The researchers then screened the offspring to find those that had incorporated miR155 into their genomes and followed them to see what effect miR155 might have. Within three weeks, the transgenic mice developed greatly enl...

Thin tough skin, slow-growing gills protect larval Antarctic fish

...cum (Antarctic silverfish). All species develop as eggs for between five and 10 months before hatching in icy waters in the Austral spring. Five years of data, collected from 2000 to 2004, were analyzed. While each species spawned at different depths, all larvae swam upward into platelet ice, located jus...

New possibilities to fight pests with biological means

...ents to localize the caterpillar and deposit their eggs on it, so that their offspring can feed on the caterpillar. Soon after, the caterpillar dies and the plant is relieved from its attacker. In the case of corn, only one gene, TPS10, has to be activated to attract the parasitic wasps. This gene carrie...

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