A stem cell from a different animal is then fused with the enucleated egg cell from the original animal. ... The parent stem cell now begins to direct the function of the enucleated egg cell. ... In some case the two twins have the same DNA. ... A set of twins is created by the fertilized egg cell splitting into to completely separate cells. ... The doctor, or scientist, could take a small sample of cells and attach them to an enucleated egg cell. ...

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• Grade Level: High School

In 1938, Hans Speman proposed cloning a mammal by transplanting an adult cell's nucleus into a fertilized egg. ... Using this process, nuclear DNA from the body cell of a donor frog was injected into the egg cell of a recipient frog whose nuclear genetic material was removed. The fused cells divided just like a normal fertilized egg and formed an embryo that was genetically identical to the donor frog. ... The key to this new procedure was to time the cell cycle of the mammary cell with that of the egg. ... The nucleus of the mammary cell was transferred into the recipient egg. ...

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- Properties of life is cells... - Cell Theory: Must have at least one i.e.: Uni-Cellular, Multi-Cellular; Cells come from other Pre-existing Cells. ... - Properties of life Grow and Reproduce: Grow: can get bigger, increase number of cells, etc. ... - Properties of Life-Adapt Levels of Organization Atoms: Molecules - Cells = the basic unit of life Question: What are cells made of? ... Sperm and eggs contain 1/2 the "Normal " amount of DNA. ...

• Word Count: 856
• Approx Pages: 3
• Grade Level: High School