7. Formally, this type of cloning is called somatic cell nuclear transfer. It involves extracting the nucleus of a cell, and putting the nucleus into an egg which has been de-nucleated. Then, the egg is allowed to divide and grow. In therapeutic cloning, the growing egg is used as a source of stem cells, which are undifferentiated cells which can grow into a wide variety of different types of cells.
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12. Several nations have passed resolutions to explicitly ban human cloning, out of concern about ethical issues.
![ZULKIFAL YOUSAF [email_address]](https://image.slidesharecdn.com/developmentalbiology03-100525114613-phpapp01/85/Cloning-1-320.jpg)
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