Word: dna
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Dates: during 1990-1999
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...these fetal cells could conceivably have found its way into the laboratory culture from which Dolly sprang. Cloning an embryo from a fetal cell, of course, would not be as big a deal. What made the Dolly experiment so extraordinary was that Wilmut had managed to get the DNA of an adult cell to revert to its early embryonic state, opening the door to the cloning of a cell from full-grown human, say, a Michael Jordan or a Bill Gates...
...span of a day, I saw a student play Game Boy during physics, another sleep during Earth science (teachers were aware of each situation but did not act upon them), a biology class act out DNA replication and chemistry students engage in a lab. Only one teacher pursued conversation with students about extracurricular activities. The variation is surprising...
...leap from animals (monkeys or chimpanzees) to humans, according to a report published last week in Nature. Dr. David Ho, director of the Aaron Diamond AIDS Research Center in New York City and one of the study's authors, says a careful genetic analysis of the sample's DNA pushes the putative origin of the AIDS epidemic back at least a decade, to the early '50s or even...
...comparing the DNA of the 1959 virus with that of samples taken from the '80s and '90s, Ho and his colleagues constructed a viral family tree in which the Leopoldville isolate sits right at the juncture where three subtypes branch out. The 39-year-old specimen is also strikingly similar to the other seven subtypes. The clear implication: all the viral strains can be traced back to a single event or a closely related group of events. One theory is that AIDS started through contact with infected monkeys in a remote area and spread to the rest of the population...
...LeTourneau lurch into this nightmare? The answer may be found in her DNA, encoded for blond hair, brown eyes and perhaps bipolar disorder, also known as manic-depressive illness. Several blood relatives filed affidavits with the court saying they had been treated for the disorder. Also, she grew up in the shadow of unapproved love: her father John Schmitz, a former ultraconservative California Congressman and college lecturer, ended his career in disgrace after fathering two children by a onetime student...