Related by context. Frequent words. (Click for all words.) 72 cloning 63 Cloned 63 cloned embryos 61 clone 60 clones 54 Cloning 53 genetically modified 53 genetically altered 52 genetically engineered 52 transgenic 50 genetically identical 49 Clonaid 47 embryonic stem cells 47 embryos 46 parthenogenesis 46 cloned animals 46 crossbreed 46 reproductive cloning 45 human cloning 45 stem cells 45 iPS cells 44 pluripotent stem cells 44 Hwang Woo suk 44 embryo 44 stem cell 44 scientist Hwang Woo 44 human embryos 44 purebred 43 artificially inseminated 43 Embryos 42 ES cells 42 embryonic cells 42 genetically matched 42 human embryonic stem 42 Hwang 41 induced pluripotent stem cells 41 therapeutic cloning 41 somatic cell nuclear 41 bioengineered 40 stem cells derived 40 offspring 40 genetic modification 40 oocytes 40 interbreed 39 fertilized eggs 39 domesticated 39 artificial insemination 39 implanted 39 Clone 39 implanting 39 Embryo 38 suk 38 gene sequences 38 selective breeding 38 adult stem cells 38 genome sequence 38 breeders 38 destroying embryos 38 genetically modified GM 38 crossbred 38 bone marrow stem cells 38 surrogate mothers 38 fertilized egg 38 microchip 38 breeder 38 mad cow disease 37 microchipped 37 genetically distinct 37 genetically 37 embryos implanted 36 Schatten 36 crossbreeding 36 SCIENTISTS 36 mad cow 36 genetically engineered mice 36 Embryonic stem cells 36 ovarian tissue 36 virgin birth 36 stem cell therapy 36 breed 36 transgenic mice 35 reprogrammed 35 vitro 35 sperm 35 gene therapy 35 germ cells 35 Genetics 35 bred 35 identification tags 35 transplanted 35 umbilical cord blood 35 neural stem cells 35 Craig Venter 35 pluripotent 35 genetically modified corn 35 genetic 35 bovine spongiform encephalopathy BSE 35 sequenced 35 interbreeding 35 Mad Cow Disease 34 slaughtered