Related by context. Frequent words. (Click for all words.) 42 transgenic 41 genetically engineered 40 vitro 39 crossbreed 39 cloned 39 transgenic mice 38 genetically altered 38 genetically modified 38 genetically identical 37 Embryos 37 germ cells 36 gene sequences 36 bioengineered 36 induced pluripotent stem cells 36 Genetics 35 genetically 34 genetic 34 crossbred 34 pluripotent stem cells 34 cloned embryos 33 artificially inseminated 33 Cloning 33 embryo 32 pluripotent 32 genome sequence 32 iPS cells 32 implanted 32 interbreed 32 Embryonic stem cells 31 clones 31 Embryo 31 genetic modification 31 offspring 31 selective breeding 31 SCIENTISTS 30 ES cells 30 cloned animals 30 bone marrow stem cells 30 genetically engineered mice 30 gene therapy 30 genetically matched 30 genetically distinct 30 clone 29 oocytes 29 neural stem cells 29 purebred 29 implanting 29 sequenced 29 artificial insemination 29 embryos 29 interbreeding 28 cloning 28 embryos implanted 28 breeder 28 bovine spongiform encephalopathy BSE 28 slaughtered 28 crossbreeding 27 fertilized eggs 27 fertilized egg 27 somatic cell nuclear 27 embryonic cells 27 destroying embryos 27 stem cells 26 stem cell therapy 26 reproductive cloning 26 breeders 26 human embryos 26 breed 26 genetically modified GM 26 ovarian tissue 26 parthenogenesis 25 Mad Cow Disease 25 stem cells derived 24 Craig Venter 24 transplanted 24 genetically modified corn 24 microchipped 24 therapeutic cloning 24 bred 23 surrogate mothers 23 microchip 23 umbilical cord blood 23 Clonaid 23 scientist Hwang Woo 23 domesticated 22 embryonic stem cells 22 adult stem cells 22 sperm 22 human cloning 21 reprogrammed 21 stem cell 21 human embryonic stem 20 mad cow disease 20 identification tags 20 Clone 18 virgin birth 18 mad cow 15 Hwang Woo suk 14 suk 12 Schatten 11 Hwang