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egg cell |
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| The latter procedure removes the nucleus of a somatic cell and transfers it to an enucleated egg cell. In this technology, an egg cell donated by a woman--not a new embryo, but a cell with no full human genome and no chance of becoming a person--would have its nucleus removed and a nucleus from a patient put in its place. The fertilized egg cell begins to divide and grow to become a blastocyst (ball of about 100 cells), then an embryo, and finally a fetus (unborn animal eight weeks after fertilization). |
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