The inheritance in other breeds isn't known other than fox terriers (both parents must be carriers) and miniature schnauzers where only one parent has to be a carrier. In the rest of the breeds it appears to be polygenic, but is believed that both parents must be carriers, although it isn't a straight recessive type of inheritance. There are multiple genes involved and may also have some environmental influence. Katie Halfen DVM Casamoko Shepherds www.casamoko.com We have Puppies!! From: MyJoyGS@xxxxxxx Date: Sun, 27 Jun 2010 17:08:23 -0400 Subject: Re: [ SHOWGSD-L ] Megaesophagus To: kthalfen@xxxxxxxxxxx; showgsd-l@xxxxxxxxxxxxx So do we know for sure if it takes two carriers to produce mega or just one..... I hear both, it takes two or nope you only need one parent who carries it. Joyce MyJoy Shepherds Home of Sel. Exc. Ch. Aramist's Enchanted of MyJoy OFA Hips/Elbows We have PUPPIES!!! http://myjoygs.tripod.com _________________________________________________________________ Hotmail has tools for the New Busy. Search, chat and e-mail from your inbox. http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_1 ============================================================================ POST is Copyrighted 2010. 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. 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 NATIONAL BLOG - http://gsdnational.blogspot.com/ ============================================================================