[Jacob-list] WHITE LAMBS

[Neal Grose]

In my experience, this is testable by crossing the white or lilac Jacob to a 
homozygous white breed. The result should be a black or mostly black lamb. 
The piebald gene is mostly recessive (that too can give you some weird 
results depending on the white breed. Suffolk, Corriedale? You might get 
black and grey...)   The best test would be to breed to a moorit, which is 
the least dominant color, therefore all of the genes from the Jacob allele 
would express.
It dawned on me that something weird was up the year we bred a lilac carrier 
Jacob ram over 4 white Lincoln X Finn ewes and got 13 black lambs. At any 
rate, % color will vary over a wide range, and will tend to expand that 
range without counter-selection. In other words, the more we don't select 
for a breed standard, the less the flock will look like the breed standard, 
regardless of "purity".

Neal Grose


-----Original Message----- 
From: Carl Fosbrink
Sent: Saturday, March 31, 2012 12:28 PM
To: G & J Johnston ; Jacob-list at jacobsheep.com
Subject: Re: [Jacob-list] WHITE LAMBS

Since a Jacob cross is black with usually a white spot on it's forehead I
have been told that a Jacob with close to 15% dark is more likely to be pure
Jacob than one with close to the 85% dark. I don't know about the all white
other than an albino. Albinos can occur in any animal. I don't think all
white with blue eyes instead of pink would be an albino, but simply an all
white sheep.

--------------------------------------------------
From: "G & J Johnston" <westergladstone at btinternet.com>
Sent: Thursday, March 29, 2012 7:05 AM
To: <Jacob-list at jacobsheep.com>
Subject: Re: [Jacob-list] WHITE LAMBS


> As a Jacob is genetically a black sheep with white spots, would a totally

> white one not simply be expressing an all-encompassing white spot?  Or is

> that too simplistic?

>

> www.scothebs.co.uk

>

>

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