We had a genetic trait for a couple years of a normal 8 point rack on one side, but just a fork on the other. The fork wasn't branched, it was 2 spike main beams that split at the growth plate on the same side.
It took 2 or 3 years to get all of them. 5 different bucks if I remember correctly. Dad got around despite being an ugly SOB. I made it my personal mission and got 3 myself.