Following on from this, do you know if the pattern genes have any statistical liklihood like the colours do eg if I bred my pure Haflinger (chestnut with flaxen mane/tail) to a strawberry roan or chestnut roan what might I get odds wise???
Heres a question for you chev, what determines the color of bay? My geldings dam was a gorgeous dark mahogany bay, and his sire is black w/a red gene(Sire's dam was dark bay as well). Jackson is a much lighter copper bay almost the color of a penny when freshly shed out, he does have some countershading but there is no dun in his lineage so I know it's not a "dorsal stripe" as w/Dun. Do both parents have something to do w/the color bay, or is it mainly just the parent that contributes the agouti gene?
The sooty gene contributes to dark bays, and can give quite a variation from vague countershading that resembles dun stripes through to those who have countershading all the way down the ribcage to the soft parts.
But as to what causes different shades... that question hasn't been answered yet!