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► The Agouti gene 
Description: The agouti gene produces banded hair by periodically changing the kind of pigment (eumelanin or a reddish pigment called phaeomelanin) produced by the melanosomes that are injecting pigment cells into the base of the hair. The change is observed to take place very rapidly along the hair, and on a given animal affects only certain kinds of hair. On bay horses, for instance, the coarsest hairs (mane, tail, lower legs and whiskers) are black, the softer body hairs are red-brown, and variable numbers of black-tipped red hairs appear along the back, sometimes producing shadings down the sides. Tabby cats have solid black hairs in the dark stripes and banded ones in the light stripes. Agouti coloring in domestic dogs ranges from fawn with a few black-tipped hairs (great Danes and boxers) to dogs with black guard hairs and a tan undercoat (my Shelties) to dogs with several bands per hair of black and very pale cream (Norwegian elkhounds). Wolves, coyotes, rabbits, mice, and most other wild animals have a high percentage of banded hair.

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Added on: 29-Apr-2008
Hits: 280

► The Truth about Merle Pomeranians 
Description: The Truth about Merle Pomeranians

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Added on: 17-Jul-2009
Hits: 184

► VetGen DNA CHROMAGENE Coat Color Testing 
Description: VetGen DNA CHROMAGENE Coat Color Testing

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Added on: 20-Feb-2012
Hits: 17