1.   And if you can grow a human from a single embryo cell, is that cell the moral equivalent of an entire embryo?

2.   If you can grow a mouse from a single embryo cell, you should in theory be able to grow a human from a single human embryo cell.

3.   The cells can replicate indefinitely, allowing a single embryo to give rise to a long-lasting batch.

4.   Through improved techniques, the single embryo will implant itself in the womb, split on occasion into twins, but otherwise grow into one healthy baby.

5.   A developed stem cell line comes from a single embryo, becoming a colony of cells that reproduces itself indefinitely.

6.   A single embryo creates a single cell line, which can replicate itself indefinitely.

7.   Each stem cell line comes from a single embryo.

8.   Embryonic cell lines, each deriving from a single embryo, have the ability to divide into an infinite number of biological blank slates.

9.   But the researchers said the technique could be used to produce eight or more identical monkeys from a single embryo.