News tagged with positive selection
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Search results for positive selection
Ecological speciation by sexual selection on good genes: Is speciation adaptive?
Nov 26, 2009 |
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Darwin suggested that the action of natural selection can produce new species, but 150 years after the publication of his famous book, 'On the Origin of Species', debate still continues on the mechanisms of speciation. New ...
Studies suggest males have more personality
Nov 18, 2009 |
3.7 / 5 (9) |
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(PhysOrg.com) -- Males have more pronounced personalities than females across a range of species - from humans to house sparrows - according to new research. Consistent personality traits, such as aggression ...
Timber harvest impacts amphibians differently during life stages
Nov 03, 2009 |
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Frogs are croaking in clear-cut forests, but not exactly in their traditional manner. University of Missouri researchers found that removing all of the trees from a section of the forest had a negative effect ...
A modernized methodology for obtaining new varieties of potato
Dec 01, 2009 |
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Research into the potato tuber at the Basque Institute for Agricultural Research and Development and at the NEIKER-Tecnalia Technology Centre has, in recent years, focused on the development of new varieties of potato adapted ...
AIDS research reveals a lack of family-planning programs in Uganda
Medicine & Health / HIV & AIDS
Nov 23, 2009 |
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University of Alberta graduate student Jennifer Heys wants to make her message clear: there needs to be more education in Ugandan communities about contraception.
Gay, bisexual men who have social anxiety tend to engage in risky sex
Medicine & Health / HIV & AIDS
Dec 01, 2009 |
5 / 5 (1) |
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A Ryerson University HIV researcher has found a link between social anxiety and unsafe sexual activities among gay and bisexual men, some of whom are HIV-positive.
New study finds men and women may respond differently to danger
Nov 29, 2009 |
4.7 / 5 (3) |
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Researchers using functional magnetic resonance imaging (fMRI) to study brain activation have found that men and women respond differently to positive and negative stimuli, according to a study presented today at the annual ...
First live targeting of tumors with RNA-based technology
Nov 30, 2009 |
4 / 5 (1) |
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(PhysOrg.com) -- Finding and treating a tumor without disturbing normal tissue presents challenges - sometimes the most effective therapies can be invasive and harsh.
Opposites attract: Monkeys choose mating partners with different genes
Nov 24, 2009 |
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The world's largest species of monkey 'chooses' mates with genes that are different from their own to guarantee healthy and strong offspring, according to a new research study.
Rare Charles Darwin book found on toilet bookshelf
Nov 22, 2009 |
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(AP) -- An auction house says it is selling a rare first edition of Charles Darwin's "On the Origin of Species" found in a family's guest lavatory in southern England.
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