Search Results for: mutations

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2,451 results

2,451 results for: mutations

  1. Health & Medicine

    Attacking Alzheimer’s

    Some researchers now suggest that the so-called amyloid hypothesis is overstated and that other entities, including tau tangles, are as important as beta-amyloid in Alzheimer's disease.

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  2. Anthropology

    DNA Diaspora: Humanity may share tangled genetic roots

    A controversial new genetic analysis concludes that Homo sapiens evolved by expanding out of Africa in multiple waves beginning at least 600,000 years ago and then interbreeding, rather than totally replacing close relatives such as the Neandertals.

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  3. Health & Medicine

    Leukemia overpowers drug in two ways

    Researchers discover why the anticancer drug Gleevec, also called STI-571, helps many patients who have chronic myelogenous leukemia but not those who have entered the crisis stage of the disease.

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  4. Biological Dark Matter

    The discovery that some genes encode RNA strands instead of proteins has surprised biologists.

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  5. Health & Medicine

    Acacia-tree extract fights cancer in mice

    Compounds called avicins extracted from Acacia victoriae, an Australian desert tree, inhibit inflammation and cancer in test-tube and mouse studies.

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  6. Health & Medicine

    Color array reveals breast cancer types

    A suite of genes lights up when researchers probe for cancer.

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  7. Health & Medicine

    Taking a Break

    Can interrupting their treatment benefit HIV-infected people?

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  8. Health & Medicine

    Surprise! Obesity (and Inactivity) Can Spur Cancers

    Some 60 percent of U.S. adults say they’re worried at the prospect of developing cancer, yet only 6 percent recognize that being overweight is a leading predisposing factor. That’s one finding from a June survey, commissioned by the American Institute for Cancer Research in Washington, D.C. The survey was unveiled on July 11 at a […]

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  9. Health & Medicine

    Gene links eyelids and early menopause

    A gene that orchestrates ovary and eyelid development may be the key to early-onset menopause.

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  10. Health & Medicine

    Mice reveal the off switch for inflammation

    Working with genetically engineered mice, scientists have identified a crucial natural mechanism that rodents use to shut down inflammation before it does harm.

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  11. 18938

    In grad school, I read and learned from Ernst Mayr’s Populations, Species, and Evolution (1963, 1970, Harvard University Press). I think that “Alarming butterflies and go-getter fish” extremely simplifies Mayr’s position on speciation. The article says that Mayr focuses solely on geographic separation, “allopathic speciation.” This ignores the fact that Mayr discussed a variety of […]

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  12. Evolutionary Upstarts

    Theories of the evolution of the human mind are evolving, with some researchers now presenting alternatives to the dominant notion that genetic competition for survival during the Stone Age yielded brains stocked with a bevy of instincts for specific types of thinking.

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