Dear Betsey, It is probably a chromosomal irregularity where the ability to produce color in one eye was lost during either the developement of the whelp from an embryo or the maturation of the sperm or egg cells. Usually this will not be inheritable. I have only seen it once in a Tri-color puppy that did not survive to 8 weeks of age.
Sometimes during replication in the formation of eggs and sperm, the chromosomes will make an error in splitting and instead of dividing equally in halves, one or the other of the halves will get more or less gene alleles than it should. What you get is a defect that was not inherited, but was accidental. I suspect that is what the blue eye/ black eye combination usually is in Cavaliers. However, there are some dog breeds that are bred for differing eye color so sometimes it can be inheritable. It never occured again so I suspect that it was accidental in the Tri pup that we had. All the best, Susan Cochran ----- Original Message ----- From: "Betsey Lynch" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Sunday, August 25, 2002 8:13 PM Subject: Re: [CKCS-L] new subject.color genetics > > I'm not surprised. I know that the English breeders used several other > > spaniels in the 1920s to 1940s when they were trying to get the nose back. > I > > have some copies of Amice Pitt's correspondence where she mentions using a > > liver & white, but doesn't say what breed. She also mentioned that they > were > > using black & whites, roans, and dogs with china blue eyes. > > I saw a 2 year old tricolor Cavalier yesterday that had one china blue eye > and one brown eye. It looked very odd. What would be the genetics behind > that, Susan? > > Betsey Lynch > > ========================================================= > "Magic Commands": > to stop receiving mail for awhile, click here and send the email: > mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20NOMAIL > to start it up gain click here: > mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20MAIL > > E-mail [EMAIL PROTECTED] for assistance. > Search the Archives... http://apple.ease.lsoft.com/archives/ckcs-l.html > > All e-mail sent through CKCS-L is Copyright 2002 by its original author. ========================================================= "Magic Commands": to stop receiving mail for awhile, click here and send the email: mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20NOMAIL to start it up gain click here: mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20MAIL E-mail [EMAIL PROTECTED] for assistance. Search the Archives... http://apple.ease.lsoft.com/archives/ckcs-l.html All e-mail sent through CKCS-L is Copyright 2002 by its original author.
