How Cloning Works
Getting a New Nucleus
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Passage 7 Getting a New Nucleus |
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| Graphic Overview of the Process of Nuclear Transfer | 
At this point, researchers took one of these cells and removed its
nucleus
, containing the
chromosomes
. They also took an egg that had been removed from the
ovary
of a second adult sheep and cut out its nucleus. The nucleus that had been removed from the first sheep's
udder
cell was inserted in to the nucleus-free egg. With a tiny jolt of electricity, the two parts
fused together
. The egg began dividing just like a fertilized egg. |
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| What did each sheep provide in making Dolly? | This egg was
cultivated
until it had grown into a several-celled
embryo
. Then it was implanted in the uterus of a third sheep, a
surrogate
, who carried the lamb until she was born and became known to the world as Dolly. |
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Can you R.A.P. this passage? | |
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Project Intersect http://intersect.uoregon.edu
Copyright
©1999-2000 Center for Electronic Studying, University of Oregon. |
