Sentences with phrase «white marking genes»
White Aussies are rare today because we have been slowly eliminating the «more white» forms of the white marking genes from our gene pool by not breeding Aussies with more than allowable white (though the preference for white trim on the show dogs does have some pushing the envelope.)
http://www.ashgi.org/ Not exact matches
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Color is actually governed by several sets of genes, some that produce the color itself, others that influence intensity, pattern, amount and distribution of white markings, or distribution of pigment on individual hairs.
Dogs with acceptable markings who have puppies with too much white are carrying genes for the extra white and should be bred to mates from families where excess white does not occur.
The gene responsible for white in boxers is not a color gene but a marking gene, which means that a white boxer would be fawn or brindle if the white was not present.
Continuing with the example of white markings in IG's, the gene is known as the «S» or spotting gene.
This gene has four alleles, solid, Irish marked, piebald (pied) and white.
The white markings may occur because the dog is a double merle (two copies of the merle gene) or because normal white markings are overextended on the head.
This is the normal gene in breeds without white markings.
The coloration of the Turkish Van, which is considered by many to be the original breed to carry the piebald gene, calls for a white, semi-longhaired cat with colored markings restricted primarily to the head and tail.