Word: embryos
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...cells in a war full of cautionary tales. Most Democrats, and some Republicans, have pushed for full federal funding of embryonic-stem-cell research, an issue so hot it tipped some close 2006 midterm races. But since then, the biggest breakthroughs have come in techniques that do not use embryos at all but instead reprogram adult cells. Do proponents look reckless for putting all their emphasis on embryos, which even some prominent scientists find morally troubling? Or prescient, because the basic knowledge gleaned from embryo research is what may help make it unnecessary someday...
...living will before sustaining near fatal injuries in a car accident. The will empowered her parents to make "any and all decisions regarding medical treatment," including terminating "life-sustaining treatment." The parents wanted to clone Dolly by taking a healthy cell from her body and inserting it into an embryo whose genetic material had been removed. The case hinged on a single question: Did the state's ban on such cloning violate the constitutional rights of Dolly and her parents? "You do not need to arrive at a definitive conclusion," Obama advised in the five-page exam. "Instead, make...
Consider the obvious implications if rights attain the moment the egg and sperm meet: all kinds of embryo research become questionable, starting with the stem-cell research McCain says he favors. Couples who undergo in vitro fertilization and then choose not to implant all the embryos are surely violating the rights of those that are discarded or frozen. Some forms of contraception, such as IUDs and the morning-after pill, would presumably be illegal if they affect the ability of an egg to implant. Abortion opponents contend that the birth control pill itself, while designed to prevent ovulation...
...then there is Amendment 48, which defines "any fertilized egg, embryo, or fetus" as a person under the law. That one, backed by such high-profile figures as former Republican president contender Mike Huckabee, is sure to raise the voting day turnout among Evangelical Christians and pro-life Catholics. But will that translate into a bump in support for McCain...
...have missed it in biology class, but in some finned species, like the Atlantic silverside - as well as in many reptiles - sex is determined not by genetics but by temperature: the undifferentiated embryo develops testes or ovaries on the basis of whichever option conveys evolutionary advantages for that particular environment. Now, in a study published in the July 30 edition of the scientific journal Public Library of Science, Natalia Ospina-Alvarez and Francesc Piferrer have gone a little further in explaining how that mechanism works. In laboratory tests, they have demonstrated that higher water temperatures result in more male fish...