Talk about overstaying your welcome.
Genes are the blueprints of life. Genes control everything from hair color to blood sugar by telling cells which proteins to make, how much, when, and where. Genes exist in most cells. Inside a cell is a long strand of the chemical DNA (deoxyribonucleic acid). A DNA sequence is a specific lineup of chemical base pairs along its strand. The part of DNA that determines what protein to produce and when, is called a gene.
First established in 1985 by Sir Alec Jeffreys, DNA testing has become an increasingly popular method of identification and research. The applications of DNA testing, or DNA fingerprinting within forensic science is often what most people think of when they hear the phrase. Popularized by television and cinema, using DNA to match blood, hair or saliva to criminals is one purpose of testing DNA. It is also frequently used for other benefits, like wildlife studies, paternity testing, body identification, and in studies pertaining to human dispersion.While most aspects of DNA are identical in samples from all human beings, concentrating on identifying patterns called microsatellites reveals qualities specific and unique to the individual. During the early stages of this science, a DNA test was performed using an analysis called restriction fragment length polymorphism. Because this process was extremely time consuming and required a great deal of DNA, new methods like polymerase chain reaction and amplified fragment length polymorphism have been employed.The benefits of DNA testing are ample. In 1987, Colin Pitchfork became the first criminal to be caught as a result of DNA testing. The information provided with DNA tests has also helped wrongfully incarcerated people like Gary Dotson and Dennis Halstead reclaim their freedom.
Ancient skeletons from a cave in Israel show genetic links to people from what is now Turkey and Iran.
An opinion piece published today in the journal Annals of Internal Medicine argues that genomic screening should over time become a more mainstream part of medical care. But an expert urged caution.
Scott Michael Johnson's remains had been among thousands unidentified following the attacks. Medical examiners managed to fix that using new DNA technology.
A new DARPA program will explore ways to better protect people against biological and chemical threats by temporarily "tuning" gene expression.
Two graduate students developed a method for synthesizing DNA that could make it much faster, cheaper and easier for biologists to create synthetic DNA sequences.
Scientists analyzed mitochondrial DNA to prove that a fossil belonged to an unknown, ancient cousin of modern pandas.
DNA and other stringy molecules could store data much more efficiently than hard drives in modern computers.
Up to 70 percent of women with a certain type of breast cancer may not need chemotherapy, a new study finds.
23andme, ancestry.com and other services promise to unlock ancestry secrets hidden in your genetic code. But how do they work?
The Golden State Killer was caught last April thanks to a genealogy website. NIH bioethicists discuss the ethics behind this controversial use of genetic data.
A new video showing a tree releasing a huge dust cloud of pollen, aka "plant sperm powder," doesn't show anything all that unusual, plant biologists say.
When you think of DNA, odds are, you picture the famous double helix, a ladder-like structure elegantly twisted like a corkscrew. But DNA doesn't always assume this form.
The remains of a 6-inch long mummy from Chile are not those of a space alien, according to recently reported research. These findings were supposed to end the controversy but they ignited a new one.
A team of forensic scientists has managed to extract DNA from a 4,000-year-old mummy, and their finding has solved a century-old mystery of its ransacked tomb.