[Jacob-list] SUED question

[Lasell J. Bartlett]

 From what I understand, SUED shows up when a 4 horn carrier breeds  
with a 4 horn carrier, and chance has it show it. (Sorry for rough  
genetic description?)

Can a 2 horn Jacob carry the gene and pass it along, so that even if  
it would never show up in a 2 horn sheep, it could show up in a later  
generation if the 2 horn or its offspring, had 4 horn offspring (that  
was bred to carrier 4 horn)?

Or does the gene NOT get passed along through the 2 horn sheep?

Or something else?

Under what circumstances do any of you breeders cull or not cull  
lambs with (milder degrees of) SUED?

Lasell J Bartlett
lasell at lasell.org