[Jacob-list] question on horns

[Linda]

So, is it possible for a sheep to be genetically both horned and scurred? Since they are on different chromosomes?   What could you expect as a phenotype?  I'm confused about just what is behind a four horned ewe with lateral scurs.  Is this an expression of carrying both the horned and scurred gene or is it an expression of carrying the hornless gene?  

If the hornless gene is expressed in the laterals on ewes, is it also expressed in some way on two horned ewes? 

It's a fascinating topic, but confusing (to me anyway)

Linda

 

On Tue, 3 May 2005 08:57:45 EDT, Jacobflock at aol.com wrote:

> The gene that controls polled or horned is located on chromosome
> 10.  The gene that controls multiple horns has not been reported
> out yet.  The hornless gene which produces scurs and aberrant horns
> is evidenced in the lateral horns of ewes.  The gene is known to
> exist but chromosome location is not known.
>
> The location of the hornless gene may well be on another chromosome
> IF the hornless gene (scurs included) in sheep is siimilar to the
> gene that produces scurs in cattle.  The poll/horn gene in cattle
> is on ch 1, the scur gene is on ch 17 or 19 .. I forget which.
>
> Fred Horak

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