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Would you like a dark-haired girl with a high risk of someday getting colon cancer, but a good chance of above-average music ability?Or would you prefer a girl with a good prospect for high SAT scores and a good shot at being athletic, but who also is likely to run an above-average risk of bipolar disorder and lupus as an adult?You've probably read about concerns over "designer babies," whose DNA is shaped by gene editing.Greely is focused on a different technology that has gotten much less attention: In a startling bit of biological alchemy, scientists have shown that in mice, they can turn ordinary cells into sperm and eggs.Unlike in vitro fertilization today, which typically yields around eight eggs per try, the new method could result in 100 embryos.The embryos' complete library of DNA would be decoded and analyzed to reveal genetic predispositions, both for disease and personal traits. The man and woman would get dossiers on the embryos that pass minimum tests for suitability.Out of, say, 80 suitable embryos, the couple would then choose one or two to implant.That procedure looks for a specific problem in a few embryos, not entire genomes from dozens of them.Much of this "epigenome" would develop after an embryo's genes are sampled, Scott said.
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