Problem 5

Background and context

• In therapeutic cloning, the desired end is not an individual organism but various types of mature cells.
• The major challenge in therapeutic cloning using adult stem cells is controlling gene expression.
• The blastocyst is not transported to a womb in therapeutic cloning. Embryonic stem cells are extracted from the cloned blastocyst instead. These stem cells are genetically identical to the donor organism, suggesting that they could be useful in the research of hereditary diseases.