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Tag: "female" at biology news

Researchers discover inherited mutation for leukemia

...ch the father, four sons, a grandson and a distant female relative developed this form of leukemia. The chemical change is called DNA methylation. Healthy cells use this process to silence unneeded genes. But abnormal DNA methylation can turn off genes that control cell growth, and that lead to tumor gr...

Agent slows aging in mice

...l Center. No significant difference occurred in female mice. The scientists can’t explain why at this poi...st analysis,” Miller says. “It may be that the female mice because of their hormonal status have other pathways to death and disability, or need higher or...

Largest synthetic gene ever built offers insights into anti-malarial drug resistance

... protozoan parasite transmitted by the bite of the female Anopheles mosquito. There are about 160 different species of malaria parasites, according to Roepe. Five infect humans, but P. falciparum is responsible for about 1 million deaths out of 300 million acute cases of infection each year. Most of these d...

New collaborative research reveals chimpanzees can sustain multiple-tradition cultures

... each group of chimpanzees observed a high-ranking female member of its own group complete an action sequenc... the different methods chosen by each high-ranking female were passed among members of her group, thereby becoming a local tradition. In all, the research...

Rising skin cancer rates are more likely to affect wealthy people, says 12-year review

...er cent of all male cancers and 26 per cent of all female cancers. “These findings show that many patients will have more than one skin cancer, highlighting the need to analyse both patient numbers and sample numbers to provide an accurate picture of cancer levels” says co-author Dr Susannah Hoey from t...

Physicist cracks women's random but always lucky choice of X chromosome

... University of Warwick physicist has uncovered how female cells are able to choose randomly between their two X chromosomes and why that choice is always lucky. Human males have both a X and a Y chromosome but females have two X chromosomes. This means that in an early stage in the development of a woman’s...

ASU research shows connection between testosterone, dietary antioxidants and bird coloration

...erone, carotenoids and immune state in 35 male and female zebra finches. They surprisingly found that when they administered testosterone implants to zebra finches that it acted as a stimulant to the immune system. They went on to show that carotenoids acquired from food and circulating through the blood we...

Study shows lizard moms dress their children for success

...versity of California, Santa Cruz, have found that female side-blotched lizards are able to induce different... later print issue), the researchers reported that female side-blotched lizards give an extra dose of the hormone estradiol to their eggs in certain social ci...

MU researchers to study the status of black bears in Missouri

...e the number of bears, the gender ratio of male to female bears, where the bears are migrating from and if they are reproducing. “This study is a good example of the use of cutting-edge molecular biology in the management of Missouri’s wildlife,” Eggert said. “We’re pleased to work with the Missouri Dep...

Study investigates 'divorce' among Galapagos seabirds

...s has been found in other birds. But, often the female seeks a divorce after a few breeding seasons. Si...ed, there are plenty of bachelors available if the female has a wandering eye. “Our study population has 50 percent more males than females, creating the o...

Exploring the dark matter of the genome

...e total DNA in a fruit fly is heterochromatin. The female fly has an estimated 60 megabases of heterochromatin" -- a megabase (Mb) is a million bases, the nucleotide building blocks of DNA -- "and the male has an estimated 100 Mb, because the Y chromosome, estimated at 40 Mb, is all heterochromatin." He...

CU study reveals why starling females cheat

...niversity of California-Berkeley. Usually, if a female bird (and at times if a human female) is caught ch...possible to spread their genes, the reasons behind female infidelity appear more complex. With this study and this species, "we can break down the reasons why...

Male circumcision overstated as prevention tool against AIDS

...l’s human rights and are perceived as an attack on female prostitutes who are viewed as victims of gender and income inequality. Such organizations do not properly weigh the loss of human rights and life itself that this virus, unleashed on a community, is causing. This virus, itself, is a violation of huma...

Mule deer moms rescue other fawns

...female's own offspring, even though this means the female invests time and energy and puts herself at risk by helping many other animals. In contrast, a whitetail mother waits to assess whether a fawn is her own before she steps in to defend it. As a result, whitetail fawns suffer considerably more predatio...

Philandering female felines forgo fidelity

...ZSL) have found that, in cheetah society, it’s the female with the wandering eye, as reported in a paper in ...males monopolizing many females. “It seems that female cheetahs are highly promiscuous with no detectable mate fidelity between breeding seasons,” said Dr....

Hearts of male and female rainbow trout are different

...amined. Nor were comparisons made between male and female fish (the largest group of vertebrates) made. Ther...h old, hatchery raised, sexually-immature male and female rainbow trout. Each strip was prepared in one of two ways: (1) incubated without stimulation (i.e., ...

Female-led infanticide in wild chimpanzees

...ficant additional evidence for such behavior among female chimpanzees, speculation had been that female-led ...ssion, but instead appear to represent part of the female behavior repertoire in chimpanzees. What drives the behavior is not yet clear, but may stem from ...

From the deep -- Researchers find new species of sea anemone

...pearseae reproduce (each anemone may have male and female sex organs), or if it lives exclusively on whale carcasses. "So far, a single dead whale is the only place where we've found these anemones," Daly said. She and Gusmão plan to include A. pearseae in a long-term evolutionary study of genetic rel...

Hexavalent chromium in drinking water causes cancer in lab animals

... found in some drinking water sources. Male and female rats and mice were given four different doses of s... are rarely seen in laboratory animals. Male and female rats had malignant tumors in the oral cavity. The studies conducted in mice found increases in the n...

Rare soft-shell turtle, nesting ground found in Cambodia

... captured and released an 11-kilogram (24.2-pound) female Cantor’s giant softshell turtle (Pelochelys cantorii) during a survey in March. “This incredible discovery means that a unique turtle can be saved from disappearing from our planet,?said David Emmett, a CI wildlife biologist. “We thought it might ...

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(Date:7/11/2014)... Stem Cell scientists have set a "mouse TRAP" to ... by a recent study published in the Journal ... uses a technique called TRAP to extract cellular and ... Invented by scientists at the Rockefeller Institute for Medical ... to the protein-making machinery, or ribosomes, of the cell ...
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