Quarter

What it can come out as

How each one is actually drawn - region by region, and the layers it is built from - is on the coding tab.

Crossing two of them

Finding one

About 1 in 595 wild horses is born showing this. That is the whole of the supply: catch one, or make one with the carrot below. Breeds set their own pools and a breed built around this gene will carry it far more often than the wild population does.

Its gene carrot

The file

common/src/main/resources/horsegenetics/genes/quarter.json — a data-driven gene, not a Java class. It is listed in the index.json beside it and registered by Genes' class initialiser at startup.

What it paints

Each outcome, described the way the gene file describes it, and then the layers that draw it in the order they are painted. The prose is the part a reader checks a bake against; the list underneath is what the engine actually did.

Double Quarter

Half the trunk rather than a quarter of it: either both front quadrants, both back, both upper or both lower, so one of the two cutting planes disappears and the two quadrants read as a single field with no seam where they meet. Between a third and three-fifths of the horse. Which plane survives and which side of it is pale are both settled at birth.

1. the two front quadrants — AXIS × CHOICE × CHOICE × NOISE, painted with TOWARD
2. the two back quadrants — AXIS × CHOICE × CHOICE × NOISE, painted with TOWARD
3. the two upper quadrants — AXIS × CHOICE × CHOICE × NOISE, painted with TOWARD
4. the two lower quadrants — AXIS × CHOICE × CHOICE × NOISE, painted with TOWARD

Coloured Quarter

The same marking in a colour the line carries rather than in white. Fully recessive: it takes two copies, and a single copy beside a white allele shows white. It never gives blue eyes, whatever the white form does. It mirrors Double Quarter rather than Part Quarter: a horse showing the coloured form carries no white allele at all, so there is no second shape left to tell apart.

1. the two front quadrants, in colour — AXIS × CHOICE × CHOICE × NOISE, painted with TOWARD
2. the two back quadrants, in colour — AXIS × CHOICE × CHOICE × NOISE, painted with TOWARD
3. the two upper quadrants, in colour — AXIS × CHOICE × CHOICE × NOISE, painted with TOWARD
4. the two lower quadrants, in colour — AXIS × CHOICE × CHOICE × NOISE, painted with TOWARD

Part Quarter

One contiguous quadrant of the trunk, a fifth to a third of the horse. Two planes cut it: one square across the body axis, one level through it, and the quadrant the pale field takes is settled at birth and does not move. The transverse boundary sits square to the body and the level one runs the length of it, and the two do not meet in a corner - the intersection rounds off over a wide radius because both boundaries are long soft gradients rather than lines. The quadrant may be filled anywhere from three-fifths to fully, and where it falls short the gap is taken from the corner furthest from its centre.

1. the front upper quadrant — AXIS × AXIS × CHOICE × CHOICE × NOISE, painted with TOWARD
2. the front lower quadrant — AXIS × AXIS × CHOICE × CHOICE × NOISE, painted with TOWARD
3. the back upper quadrant — AXIS × AXIS × CHOICE × CHOICE × NOISE, painted with TOWARD
4. the back lower quadrant — AXIS × AXIS × CHOICE × CHOICE × NOISE, painted with TOWARD

Wild type

No quartering.

Paints nothing.