cloning These agree each descended from the symmetrical splitting of a single fertilized egg into cells that contain the identical sequence of billions of steady tinier DNA molecules. They occur well-nigh once every 250 births, which makes them closely a third as common in the States as fraternal twins, who descend from twain separately fertilized bollock and ar no more similar genetically than other(a) siblings. Identical twins are far more well-known(prenominal) than, say, septuplets, but there is mute something a little eery about them, from the double-your-pleasure Doublemint girls to the ghost girls haunting the snowbound lodge in "The Shining.
" Maybe its the disorientation induce by a gentlemans gentleman optical illusion. Maybe its the interchangeability of existence suggested by two lives apparently as exchangeable as bootleg videotapes. If a twins fate is demonstrably conjugated to her doubles by invisible clumps of nucleic acid, does that correspond the rest of us are just as dominate by our DNA? How measurable ...
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