The mutation causes a haploinsufficiency —a reduction in the gene's functional output—which disrupts the boundary of the initial "horn field" in the embryo. Instead of forming two distinct horn buds, the developmental field expands and splits, leading to the growth of multiple independent horns.
Historically, polycerate goats were seen as: polycerate goats
While polyceraty is a rarity across the general goat population, it is a defining characteristic of specific rare breeds. The mutation causes a haploinsufficiency —a reduction in