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tag double helix genetics genomics ecology

Science Museums Exhibit Renewed Vigor
Christine Bahls | Mar 28, 2004 | 10+ min read
Erica P. JohnsonApreschool girl with black braids presses a finger to a disk that twists a brightly lit DNA model, transforming its ladder shape into a double helix. Her head bops from side to side in wonder as the towering DNA coils and straightens. When a bigger boy claims her place, the girl joins meandering moms and dads with their charges as they twist knobs, open flaps, and simply stare at flashing helixes and orange information boards: all a part of the museum exhibit called "Genome: The
Nonradioactive Probes Protect Scientists And Environment
Holly Ahern | Apr 29, 1990 | 5 min read
For many years, geneticists determined the genetic makeup of organisms by examining the physical characteristics of their offspring. But with the discovery of the structure of the DNA double helix, first published by James D. Watson and Francis H.C. Crick in 1953 (Nature, 171:964-7), the science of genetics was forever changed. Scientists soon developed techniques to study the genetic message found in all living cells at the molecular level. One of most important of these methods was the use of
Genome Economy
Ricki Lewis | Jun 10, 2001 | 10 min read
The Human Genome Project's discovery1 that the human body runs on an instruction manual of a mere 35,000 or so genes--compared to the worm's 19,000, the fruit fly's 13,000, and the tiny mustard relative Arabidopsis thaliana's 25,000--placed humanity on an even playing field with these other, supposedly simpler, organisms. It was a humbling experience, but humility quickly gave way to awe with the realization that the human genome might encode 100,000 to 200,000 proteins. Scientists base this num
THE STATE OF LIFE SCIENCE
Dennis Meredith | Apr 1, 2007 | 8 min read
By Dennis MeredithTHE STATE OF LIFE SCIENCENorth Carolina combines academic, industrial, government, and private resources to drive research, development, and manufacturing A half century ago, the world was only beginning to grasp the stunning implications of Watson's and Crick's double-helix DNA structure. Amidst those earliest glimmerings of the genetic revolution, North Carolina was already laying the foundation for its 21st-century success in biotechnology. In 1959, however, the evidence o
Watson Departure Vexes Genome Experts
Scott Veggeberg | May 24, 1992 | 4 min read
They fear that funding support for their vast gene-mapping project could erode now that the Nobelist is leaving While the head of the nation's premier health agency may not be losing sleep over the resignation of James Watson as head of the Human Genome Project (HGP), many genetic researchers are distressed to see him go. Genome scientists interviewed for this article say it will be difficult for the National Institutes of Health, via its search committee, to find someone with the same drive
Genetic Parasites and a Whole Lot More
Barry Palevitz | Oct 15, 2000 | 10+ min read
Photo: Ori Fragman, Hebrew University Hordeum spontaneum, the plant studied for BARE-1 retroelements. With genome sequences arriving almost as regularly as the morning paper, the public's attention is focused on genes--new genes to protect crops against pests; rogue genes that make bacteria resistant to antibiotics; faulty genes that, if fixed, could cure diseases such as muscular dystrophy. What many people don't realize is that genes account for only part of an organism's DNA, and in many c
Epigenetics: Genome, Meet Your Environment
Leslie Pray | Jul 4, 2004 | 10+ min read
©Mehau Kulyk/Photo Researchers, IncToward the end of World War II, a German-imposed food embargo in western Holland – a densely populated area already suffering from scarce food supplies, ruined agricultural lands, and the onset of an unusually harsh winter – led to the death by starvation of some 30,000 people. Detailed birth records collected during that so-called Dutch Hunger Winter have provided scientists with useful data for analyzing the long-term health effects of prenat
Methylation: Gene Expression at the Right Place and Right Time
Nadia Halim | Dec 5, 1999 | 7 min read
Courtesy of Richard Roberts, New England BiolabsModel methylation reaction: Cytosine nucleotide (red) is flipped out of the DNA double helix by a methyltransferase (white), so it can be methylated. The end product after the methyl group has been transferred to the DNA is pictured in green. A tenuous link between DNA methylation and development has existed for several years. Now findings substantiate the connection. Researchers have found the first human diseases caused by defects in the DNA meth
Imaging Chromatin to Deduce Function from Form
Marissa Fessenden | Dec 1, 2018 | 7 min read
Researchers describe their tools for probing how the physical shape of the genome affects genes’ function.
How Interconnected Is Life in the Ocean?
Catherine Offord | Nov 1, 2019 | 10+ min read
To help create better conservation and management plans, researchers are measuring how marine organisms move between habitats and populations.

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