Progeny in Biological News

Yeast missing sex genes undergo unexpected sexual reproduction

... Candida 's meiosis without meiotic genes may be what gives rise to the progeny with unusual numbers of chromosomes. "Or maybe the genes were lost for a ... to genetic diversity," Heitman said. "Or maybe these differing types of progeny are the unfortunate consequence of undergoing meiosis without the ...

CSHL scientists discover a new way in which epigenetic information is inherited

... lab-bred female flies are bred with male flies caught in the wild, their progeny are sterile or unable to produce offspring -- a phenomenon called hybrid ... that happens in the organism's adulthood, but is also propagated to the progeny of that organism," explains Hannon. The impact of environment The ...

When cells go bad

... lacking a telomere occasionally escapes suicide and divides. Then, its progeny accumulate defects, including the wrong number of chromosomes or ... the road to cancer. This occurs when the damaged cell divides, and its progeny have the wrong number of chromosomes. The resulting genetic imbalance can ...

Indigenous water frogs under threat

... the indigenous species. In addition, the female marsh frogs produce more progeny than their competitors, the researchers write in the scientific journal ... more progeny, thereby crowding out the other frog species. The number of progeny is increased still further because when the marsh frog mates with Grafs ...

Understanding how weeds are resistant to herbicides

... green house, grew them up, confirmed that they were resistant and then we started crossing a resistant plant with a sensitive plant. We look at its progeny to see if the resistance is inherited to understand the genetics if it's a dominant trait or a recessive trait. "Pyrosequencing is more like just ...

Songbird study from CSHL, CCNY provides concrete measure of biology's impact on culture

... do not sing the same song as they would if raised normally, i.e., among other members of their species. It breaks new ground in showing that progeny of these "odd birds," within several generations, will introduce improvisations that bring their song into conformity with those of "wild-type" zebra ...

Darwin in a test tube

... doing so at a rate that was about a hundred times faster than the other. The other was slower at acquiring food, but produced about three times more progeny per generation. These are both examples of classic evolutionary strategies for survival, says Joyce. ...

For cancer cells, genetics alone is poor indicator for drug response

... to survive. The researchers noticed that when this outlier group was isolated and once again exposed to TRAIL, the cells and their immediate progeny continued to remain highly resistant for a short time. An immediate explanation might be that this group had developed some sort of genetic defense. ...

Therapeutic cloning gets a boost with new research findings

... used as the donor cells in a cloning process called somatic cell nuclear transfer (SCNT). This made researchers wonder if cloning by SCNT leads to progeny with more mutations than their naturally conceived counterparts. Also, would cloned fetuses receive DNA programming predisposing them to develop ...

Single adult stem cell can self renew, repair tissue damage in live mammal

... imaging as well as quantitative and kinetic analyses, Sacco and Blau tracked each transplanted stem cell as it rapidly proliferated and engrafted its progeny into the irradiated muscle tissue. The scientists then injured the regenerated tissue, setting off massive waves of muscle cell growth and ...

Radioactivity: Discover the lowest amounts with new methods

... Radioactivity Measurement Techniques". PTB scientists contribute to this international exchange with three dissertations: 1. The German thoron progeny chamber Concept and Application Abstract: For the measurement of the thoron progenies, a reference field has been estab-lished within the scope ...

No helicopter moms among Rutgers mutant mice

... discovery, which focused solely on personal risk. "We now show that having less fear can profoundly change important behaviors for the survival of progeny and the species," he said. The researchers conducted several experiments to rule out other reasons why the mutant mice were slow to retrieve pups. ...

Salk researchers reprogram adult stem cells in their natural environment

... can still veer off the beaten path and change their fate, Jessberger used retroviruses to genetically manipulate neural stem cells and their progeny in the dentate gyrus of laboratory mice. Under normal conditions, the majority of newborn cells differentiated into neurons. When he introduced the ...

Genome communication

... from the wild-type allele, which causes dark purple pigmentation. If a plant with the paramutagenic allele is crossed with a wild-type allele, the progeny get both alleles. However, the paramutagenic allele silences the wild-type allele and produces a plant with stippled rather than purple ....

Complex dynamics underlie bark beetle eruptions

... with the help of colonizing fungi, and the tree is doomed. The condition and spacing of nearby trees and the local climate affect whether the beetle progeny released after a successful attack sustain an epidemic--which can kill a high proportion of the trees in an area and so alter the landscape for ...

Inflammation triggers cell fusions that could protect neurons, Stanford research shows

... cells are known as blood stem cells, or hematopoietic stem cells. They can give rise to all the blood and immune cells in the body. Although the progeny of these hematopoietic stem cells have previously been shown to fuse with a variety of other cell types in the body, this fusion occurs so ...

Team finds an economical way to boost the vitamin A content of maize

... basis of those attributes. One hurdle to increasing the provitamin A content of maize has been the expense of screening the parent stock and progeny of breeding experiments, Rocheford said. A common technique, called high performance liquid chromatography (HPLC), can assess the provitamin A ...

Climate change predicted to drive trees northward

... trees are found are used to define the climate envelope of each species. If the trees were assumed to respond to climate change by dispersing their progeny to more favorable locations, McKenney and colleagues found, ranges of the studied species would move northward by some 700 kilometers and decrease in ...

Stomach stem cell discovery could bring cancer insights

... millions of glands of the stomach are constantly turning over. Most of the mature functioning cells live only 20 to 60 days before being replaced by progeny of dividing resident stem cells. These stem cells are not only a constant source of new cells, but they represent an important reservoir for repair ...

Study shows lizard moms dress their children for success

... in response to social cues, "dressing" their progeny in patterns they will wear for the rest of their lives. The mother's influence gives her progeny the patterns most likely to ensure success under ... being eaten. "The females are dressing their progeny for success, because they need a different back ...

Scientists track stealth DNA elements in primate evolution

... evolution by surreptitiously spawning hyperactive progeny copies, giving rise to the most abundant family ... and occasionally produce short-lived hyperactive progeny that contribute to the formation and expansion of ... rate, a 'stealth driver' may occasionally spawn progeny elements that are capable of much higher ...

Adult stem cells aid recovery in animal model of cerebral palsy

... whether the forms can produce fertile hybrid offspring in the wild, the progeny of lab matings appear to have no problems with fertility. This suggests ... genetic conditions that are not favorable for the survival of hybrid progeny in nature. To study the genetic underpinnings of speciation, the ...

Islands in the Genome Promote Speciation

... whether the forms can produce fertile hybrid offspring in the wild, the progeny of lab matings appear to have no problems with fertility. This suggests ... genetic conditions that are not favorable for the survival of hybrid progeny in nature. To study the genetic underpinnings of speciation, the ...

Same-sex mating by fungi spawned infection outbreak, evidence suggests

... same-sex mating, Heitman added. In a traditional sexual cycle, all alpha progeny inherit identical alpha genes from their alpha parent. However, the mating ... or parasites may harbor cryptic same-sex cycles that contribute to produce progeny with altered virulence, geographic or host range or other advantageous ...

Loss of stem cells correlates with premature aging in animal study

... they need to maintain the integrity of their DNA, and multiple divisions lead to natural breaks in DNA. But when these stem cells are needed, their progeny can rapidly divide and are able to replenish the tissue with new cells. Brown explains that in the current study the mouse cells without ATR ...

Cancer stem cells similar to normal stem cells can thwart anti-cancer agents

... Schools of Medicine and Pharmacy, used cell surface markers and dyes to identify cancer stem cells as well as normal adult stem cells and their progeny in samples obtained from normal lung and lung cancer tissue samples. The researchers identified a very small, rare set of resting cancer stem cells ...

Stem cells engage in dialogue with the cells that regulate their futures

... adult tissues contain stem cells. Through self-renewing division," she explained, "stem cells replenish the stem cell pool. They also produce progeny that change into other, specialized cells. Importantly, stem cells have the capacity to divide throughout the life of an organism. They do so through ...

New clues to how sex evolves

... in length, admirably suited to the study of meiosis because it is completely transparent and reproduces very efficiently, producing over 200 progeny within a few days. Most C. elegans are hermaphrodites, which have two X chromosomes (XX), while some individuals are males with a single X chromosome ...

Mayo discovers protein as potential tactic to prevent tumors

... for cells to order the production of genes involved with cell death, and the errant cell dies without propagating its damaging genetic message to progeny cells of its own." "As patients and their physicians seek to control or cure tumors, research is providing new approaches to limiting cancer ...

Scientists discover role for dueling RNAs

... cases, flipping the meiotic switch can be catastrophic. If a cell with only one copy of each chromosome (a haploid cell) is forced into meiosis, the progeny won't survive. Fortunately, such destructive meiotic division is avoided in haploid cells because they continually produce IME4 antisense RNA, ...

It's all in the genes

... Genetics and the May issue of Evolution, Whitham and fellow researchers discuss how this phenotype is heritable on an ecosystem level. That is, the progeny of a tree are likely to support the same communities of organisms and ecosystem processes that their parents supported. It's a premise with ...

For the first time: Longevity modulated without disrupting life-sustaining function

... and double their lifespan from an average of 20 to 40 days. Except the worms trade a trim life focused on reproduction for a long life with fewer progeny and a tendency to halt larval development and enter a dormant, hibernation-like stage in which they can hang on for months but don't reproduce. ...

Sex: It's costly but worth it. Just ask a microbe

... is that despite the high cost of sex there are benefits. "In many microbes, mating and sexual reproduction produce genetically diverse and hardy progeny better able to withstand environmental changes, inhospitable conditions, lack of water, extreme temperatures and fewer nutrients," says Xu. There ...

Neurons find their place in the developing nervous system with the help of a sticky molecule

... the neocortex. Application of an electrical current forced the RNA into neural progenitor cells, and it was subsequently inherited by their neuronal progeny that form layer 2/3 and blocked their ability to make MDGA1 protein. When Takeuchi and O'Leary examined the neocortex a few days later when the ...

USC researchers track down the stem cells that create feathers

... the researchers found, are well protected in the follicular base of each individual feather follicle. As they proliferate and differentiate, their progeny is displaced upward to create a feather. When the bird molts, the quill of the feather is dislodged from the follicle with a tapered proximal ...

Regenerating worms help elucidate stem cell biology

... progeny, instead, that is being affected." There's some evidence, Sánchez Alvarado said, that piwi plays a similar role in regulating the progeny of adult stem cells in humans. He cautioned that more work is needed to determine just how functionally similar the factors regulating stem cells in ...

Divergent mating systems and parental conflict as a barrier to hybridization in flowering plants

... have an interest in maximizing maternal investment in their progeny, while mothers will have an interest in carefully partitioning resources among progeny to maximize their combined success. A new study in the September issue of The American Naturalist argues that with increased self-fertilization, ...

Newly recognized gene mutation may reduce seeds, resurrect plants

... A mutated plant that seems to return from the dead may hold the secret to how some flora protect their progeny during yield-limiting drought and other stresses, according to Purdue University scientists whose study of the plant led to discovery of a gene. ...

Sandia completes depleted uranium study

... to uranium particulate could have serious health problems including leukemia, cancers, and neurocognitive effects, as well as birth defects in the progeny of exposed veterans and civilians. Marshall's study concluded that the reports of serious health risks from DU exposure are not supported by ...