1.   Nor is it science fiction to think that your cells could be improved beforehand, genetically engineered to add some genes and remove others.

2.   It is now possible to transplant genetic material for a desired characteristic in a single generation, without the risk of adding undesirable genes.

3.   By genetic engineering, it is now possible to transplant genetic material for a desired characteristic in a single generation, without the risk of adding undesirable genes.

4.   There, the missing gene will be added to the marrow by infecting it with a genetically altered virus.

5.   A biotech company in San Francisco claims it can add genes to mammalian cells by simply injecting them into the bloodstream.

6.   Adding such genes might be akin to vaccinating a child.

7.   All agree that something happened when researchers added the genes.

8.   But they could not grow such cells in the lab and add genes to them.

9.   Caplan wonders whether parents could someday choose to add genes to design their ideal child.

10.   Cloning is a prerequisite for genetic engineering, the process by which scientists alter or add genes to an embryo.