Search Results for: mutations

2,462 results for: mutations

1. 

   Feline Finding: Mutations produce black house cats, jaguars

   Mutations in two different genes, which lead to black fur in house cats, jaguars, and jaguarundis, may have protected the black felines from an epidemic long ago.

   By John TravisMarch 5, 2003

2. 

   Anthropology

   Prehistoric Family Split: DNA puts Neandertals on edge of human ancestry

   The largest sample of ancient mitochondrial DNA extracted from Stone Age fossils to date indicates that Neandertals made, at most, a small genetic contribution to our direct prehistoric ancestors.

   By Bruce BowerMarch 17, 2004

3. 

   The Bad Seed

   Researchers are racing to identify tumor-forming stem cells in skin, lung, pancreatic, and many other cancers.

   By John TravisMarch 16, 2004

4. 

   Health & Medicine

   AIDS Vaccine Tests Well in Monkeys

   An experimental AIDS vaccine bolstered with two immune proteins protects rhesus monkeys from the disease even when they are exposed to a combination of simian and human immunodeficiency virus.

   By Nathan SeppaMarch 16, 2004

5. 

   Losing Rhythm: Gene mutation causes heart problems

   Chinese researchers have for the first time identified a genetic defect that causes atrial fibrillation, a disorder in which the heart's upper chambers beat irregularly and too rapidly.

   By John TravisJanuary 8, 2003

6. 

   Anthropology

   Cannibalism’s DNA Trail: Gene may signal ancient prion-disease outbreaks

   Cannibalism among prehistoric humans may have left lasting genetic marks.

   By Bruce BowerApril 9, 2003

7. 

   Humans

   Science News of the Year 2004

   A review of important scientific achievements reported in Science News during the year 2004.

   By Science NewsDecember 15, 2004

8. 

   Health & Medicine

   Gene causes body-fat disorder

   A gene linked to a form of muscular dystrophy also causes a disease that deposits fat unevenly after puberty.

   By Damaris ChristensenFebruary 24, 2003

9. 

   Health & Medicine

   Cluster Buster: Might a simple sugar derail Huntington’s?

   A study in mice with a disease resembling Huntington's shows that a simple sugar impedes the protein aggregation that kills brain cells.

   By Nathan SeppaJanuary 21, 2004

10. 

    Brain-Cell Loss Found in Narcolepsy

    The puzzling sleep disorder known as narcolepsy stems from the destruction of a small group of brain cells.

    By John TravisJune 16, 2003

11. 

    Livers: Better late than never

    Drawing on an ancient Greek myth, researchers have given the name prometheus to a mutant strain of zebrafish that appear to have no liver early in their lives.

    By John TravisAugust 20, 2003

12. 

    Anthropology

    Humanity’s pedestal lowered again?

    A new genetic study reaches the controversial conclusion that chimpanzees belong to the genus Homo, just as people do.

    By Bruce BowerMay 28, 2003