A DNA analysis of 807 Polynesians and Native Americans suggests that their ancestors were bedfellows long ago.
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.
Genetic analysis suggests why young and otherwise healthy people who developed COVID-19 sometimes experienced severe respiratory symptoms.
Go beyond your family tree to uncover ancestry markers in your DNA, with a genetic testing kit that you can use at home.
What looks like a cross between a nebula and a 1980s dance party is something even more astonishing: a view of the locations of DNA and RNA inside a living cell.
A Native American man in Montana has what may be the oldest DNA native to the Americas, according to news reports.
Did the analysis of a silk shawl just provide a major clue in one of London's coldest cases, the identity of Jack the Ripper?
A handful of 28,0000-year-old woolly mammoth cell parts were recently "woken up" for a short time in a new experiment, but cloning the ice age beasts is still a long way off.
Rosalind Franklin was the British scientist whose work was integral to the discovery of DNA's structure.
Genetic modification purposefully alters the genetic makeup of organisms through controlled breeding or via genetic engineering technologies such as CRISPR.