A nucleus was removed from a fibroblast cell of an adult mouse (mouse 1). The nucleus was then inserted into an egg cell from which the nucleus was removed (the egg cell was from a different mouse, 2). The resulting diploid cell began to divide, and the young embryo was implanted into the uterus of a third mouse and allowed to develop. The third mouse eventually gave birth to a healthy mouse (mouse 4). Which of the following correctly identifies the procedures described above?
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