Word: dna
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These stereotypes might be blamed on DNA and social evolution, a genetic leaning toward jealousy that was exacerbated by ancient traditions of polygamy and the monthly curse of PMS. Multiple mistresses and menstrual cycles? No wonder we’re known for mood swings and swinging fists...
...DNA tests on the victims will determine whether al-Zawahiri was among the dead, but at week's end Pakistani officials were saying he had not even been in the village. An Arabic TV station, quoting sources close to al-Qaeda, said Saturday he was alive and well, while U.S. officials insisted it was too early to conclude that they had missed...
...with a $25 million reward at stake, Coleman says, "I like to have some proof." According to law enforcement and military sources, the Egyptian government has provided the U.S. with DNA from Zawahiri's brother, who is languishing in an Egyptian prison. That gives U.S. intelligence a scientific means to positively identify the fugitive Qaeda leader...
...Hwang could have forestalled some of the questions about Snuppy if he had offered one additional bit of confirming proof in his original paper in Nature. That piece of critical evidence comes from the animals' mitochondria, tiny energy-producing structures within each cell. While most of a mammal's DNA resides in the nucleus, there's also some in the mitochondria. (Nuclear DNA forms the animal's basic genetic blueprint; mitochondrial DNA contains instructions for making proteins involved in various metabolic functions within the cell...
Mitochondrial DNA is passed down from the mother as part of the egg's genetic contribution. Identical twins, for example, have the same nuclear and mitochondrial DNA, since they're produced when a single egg is fertilized and the resulting embryo splits in two. With a clone, the situation is different. Because the cloning process that Hwang says he used to create Snuppy involves two dogs--one for the nucleus and another for the egg--Snuppy's mitochondrial DNA should not match Tai's. That's what Rhee's scientists say they've found and what Hwang undoubtedly hopes...