Double flowers—though beautiful—are mutants. The genetic interruption that causes that mutation previously helped scientists pinpoint the genes for normal development of flower sexual organs in Arabidopsis thaliana. Now ...
Evolution
Sep 4, 2012
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The first step in gene expression is the exact copying of a segment of DNA by the enzyme known as RNA polymerase II, or pol II, into a mirror image RNA. Scientists recognize that pol II does not transcribe RNA via a smooth ...
Biotechnology
Aug 22, 2012
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Transcription is a cellular process by which genetic information from DNA is copied to messenger RNA for protein production. But anticancer drugs and environmental chemicals can sometimes interrupt this flow of genetic information ...
Biochemistry
Aug 21, 2012
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Research into the genetic factors behind certain disease mechanisms, illness progression and response to new drugs is frequently carried out using tiny multi-cellular animals such as nematodes, fruit flies or zebra fish.
Cell & Microbiology
Aug 19, 2012
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Genetic diversity arises through the interplay of mutation, selection and genetic drift. In most scientific models, mutants have a fitness value which remains constant throughout. Based on this value, they compete with other ...
Evolution
Jun 28, 2012
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Leaves come in all shapes and sizes. Scientists have discovered simple rules that control leaf shape during growth. Using this 'recipe', they have developed the first computer model able to accurately emulate leaf growth ...
Plants & Animals
Mar 1, 2012
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(PhysOrg.com) -- Cancer cells must prepare for travel before invading new tissues, but new Cornell research has found a possible way to stop these cells from ever hitting the road.
Biochemistry
Feb 22, 2012
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(PhysOrg.com) -- The molecular pathway that carries time-of-day signals from the body's internal clock to ultimately guide daily behavior is like a black box, says Amita Sehgal, PhD, the John Herr Musser Professor of Neuroscience ...
Cell & Microbiology
Feb 7, 2012
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Plants leaves are sealed with a gas-tight wax layer to prevent water loss. Plants breathe through microscopic pores called stomata (Greek for mouths) on the surfaces of leaves. Over 40% of the carbon dioxide, CO2, in the ...
Biotechnology
Feb 5, 2012
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New research at Harvard explains how bacterial biofilms expand to form slimy mats on teeth, pipes, surgical instruments, and crops.
Cell & Microbiology
Jan 23, 2012
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