HGG Community Forums

I'm still kind of new and I haven't read any information yet about how genetics plays into foal heights. Is there a dependable system to it? I'm assuming (at the risk of "duh") that both sire and dam's heights combine to create a range of heights within which a foal's height could fall (like a 16hh dam and a 16hh sire could create a foal whose fullgrown height is anywhere from 15.2hh to 16.2hh ??). I guess I am just wondering if anyone has more info than that, like if someone has compiled evidence already from different pairings to determine the algorithm for height range of a foal? And does it behave like a bell curve or is it perfectly random (probabilities all equal) within the possible range?