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I might add that the chimeras every one is concerned about contain human cells - most famously, pig and human cells. When the human cells become more predominant than the animal cells some scientists speculate that the result could be disturbing. There is a real ethical question involved in this discussion. ------------------ Mary Ann www.bentwillowfarm.org >> Is a mule a chimera ? > > In a chimera, the two sets of cells remain distinct . A mule is an hybrid > where all the cells are hybridized "mule cells". > > maryse > > ---------------------------------------------------------------------- > To sign-off Parkinsn send a message to: > mailto:[log in to unmask] > In the body of the message put: signoff parkinsn > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.385 / Virus Database: 268.5.1/326 - Release Date: 4/27/2006 > > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.5.1/326 - Release Date: 4/27/2006 ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn