Who knows? I DO think only one parent (or side of the pedigree!!!!!) can produce it. If you look at literally ALL of our popular pedigrees you can find popular sires, popular ROM dams, sibling of popular sires/dams w/ a missing tooth or teeth. Sometimes you hear about it, sometimes you don't. And sometimes you hear about it only after the fact when you run into trouble. (A person might say to you "heck yeah, THAT'S where your issue came from!) Some popular dogs I have seen finished can whistle <G>, and they have siblings never shown who can whistle and NO, I wouldn't/haven't knowingly used them even though some of the progeny will obviously have full mouths. And to complicate things, sometimes these thing skip a generation or two. And to further complicate things sometimes other mouth issues (wry mouth, "off" bites) are in the same lines. I just try to do my homework and not double up. Kathy, member GSDCA, DVGSDC Celebrating generations of Dual Titled TC'd Champions visit _http://www.pinehillgsds.com/_ (http://www.pinehillgsds.com/) In a message dated 8/21/2011 12:29:59 P.M. Eastern Daylight Time, ketchy@xxxxxxxxxxxxxxx writes: I am still trying to learn more about heredity, SO can anyone tell me what determines tooth absence in GSDs? Do both parents have to be carriers to produce it (or can ONE parent produce it?) Does a dog/ bitch automatically produce it if he/she HAS missing teeth? I know that dogs have finished who have had missing teeth ( or a missing tooth) and how do you feel about breeding those animals? Penny in NC The Farm Dog ============================================================================ POST is Copyrighted 2011. All material remains the property of the original author and of GSD Communication, Inc. NO REPRODUCTIONS or FORWARDS of any kind are permitted without prior permission of the original author AND of the Showgsd-l Management. ALL RIGHTS RESERVED. Each Author is responsible for the content of his/her post. This group and its administrators are not responsible for the comments or opinions expressed in any post. ALL PERSONS ARE ON NOTICE THAT THE FORWARDING, REPRODUCTION OR USE IN ANY MANNER OF ANY MATERIAL WHICH APPEARS ON SHOWGSD-L WITHOUT THE EXPRESS PERMISSION OF ALL PARTIES TO THE POST AND THE LIST MANAGEMENT IS EXPRESSLY FORBIDDEN, AND IS A VIOLATION OF LAW. VIOLATORS OF THIS PROHIBITION WILL BE PROSECUTED. For assistance, please contact the List Management at admin@xxxxxxxxxxx VISIT OUR WEBSITE - http://showgsd.org SUBSCRIPTION:http://showgsd.org/mail.html NATIONAL BLOG - http://gsdnational.blogspot.com/ ============================================================================ ============================================================================ POST is Copyrighted 2011. All material remains the property of the original author and of GSD Communication, Inc. NO REPRODUCTIONS or FORWARDS of any kind are permitted without prior permission of the original author AND of the Showgsd-l Management. ALL RIGHTS RESERVED. Each Author is responsible for the content of his/her post. This group and its administrators are not responsible for the comments or opinions expressed in any post. ALL PERSONS ARE ON NOTICE THAT THE FORWARDING, REPRODUCTION OR USE IN ANY MANNER OF ANY MATERIAL WHICH APPEARS ON SHOWGSD-L WITHOUT THE EXPRESS PERMISSION OF ALL PARTIES TO THE POST AND THE LIST MANAGEMENT IS EXPRESSLY FORBIDDEN, AND IS A VIOLATION OF LAW. VIOLATORS OF THIS PROHIBITION WILL BE PROSECUTED. For assistance, please contact the List Management at admin@xxxxxxxxxxx VISIT OUR WEBSITE - http://showgsd.org SUBSCRIPTION:http://showgsd.org/mail.html NATIONAL BLOG - http://gsdnational.blogspot.com/ ============================================================================