Originally Posted by ladytaurean515
I seen though in your thread..the stallion you have considered for breeding if you do...has he been tested? If he is - for frame it shouldnt matter if yours carries it...I believe to get a LWO both parents must at least be heter and carry the frame gene.
A frame positive horse can ONLY be heterozygous. Homozygous frame is lethal, hence the "lethal white syndrome" name. If you breed an N/O horse to an N/O horse you will have a 25% chance of an O/O foal..which is LWOS.
But yes, if the stallion has tested negative for frame, your mare's status won't matter. However, it is easier to test your mare and limit your options if she is N/O.