The regulatory body that approves all research on human eggs has just been given the green light for the production of chimeras.
Here is the article from the AP. The idea is that, with human eggs in short supply, researchers should be allowed to practice techniques on more readily available animal eggs. Also, several researchers believe the process can answer questions about how and to what extent an egg resets a nucleus from an adult cell into an embryonic state.
Ian Wilmut (who cloned Dolly the Sheep) put for the scientific rationale for chimeras last year. It’s called Man or beast? Man and beast!
Nature Reports has several related articles.
In a research highlight, the scientist who cloned frogs has studied how nuclei in cloned embryos remember the differentiated cells they came from.
Also, an article on successful monkey cloning showed the necessity of good technique.
And recent news coverage describes advances in cloning human embryos from adult cells.