Traits

Genetic Info
Genotype: O_
Locus:  Not shared with any known genes.

(Images from left to right: Chestnut Overo with a more minimal visual expression, Chestnut Overo with a more maximum expression, Chestnut Overo with a more mid range expression)


Overo is a white marking that spreads from the center of the body.

It usually appears on the side of the barrel and spreads outwards to the "edges" of the body.
Overo rarely affects the legs, and tends to spread on the side of the leg closest to the belly.
Overo causes irregular spreading of face markings, and can create bald face or badger face markings.
Overo should have crisp edges, which may be smooth or jagged. Overo should not have holes within it's markings.
Notable Interactions:

  • Tobiano: When Tobiano and Overo are both present, it is often colloquially known as 'Tovero'.
  • ❗ Lethal White: Homozygous Overo (OO) and/or the combination of Overo and Ossuary (nO nOs) result in a fatal condition known as 'Lethal White Syndrome.'  If a breeding results in a foal with OO or nO nOs, that foal cannot be born. Slots and items will still be consumed, so plan your breedings with care!

Additional Notes:

  • Badger Face: A distinctive marking that resembles a "reverse blaze" with the base coat showing on the front of the face and white on either side.
  • Bald Face: A white marking that covers most or all of the face.
                       
Badger Face
                           
Bald Face
 
Overo's effects on:
  • Coat Color: Overo is a white marking.
  • Mane & Tail Color: Mane will be white where marking touches. Overo cannot touch the tail.
  • Skin Color: Overo will turn skin light pink underneath the white marking.
  • Eye Color: Overo can make the eyes blue, even if the marking does not touch them.
  • Hoof color: Overo will turn hooves cream or light tan where touching.

Overo Range

Minimum Range:
Overo can be hidden entirely. Minimal expression will result in an irregular white marking somewhere on the barrel or neck of the horse.
OveroRange.png
Minimum Maximum out of range
Maximum Range:
Irregular white that spreads out from the belly. White markings should not touch the topline or "cross" the center of the horse anywhere but the belly.
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