Not sure yet as to whether or not it's a trait that's passed on or not.....
What I can tell you is that this girl was born 4 years ago. Her dad was 9-10". Her mom was 17-18" She's 9-10" and is potentially expecting.
I also have 2 other CB females here that were from the same litter, mom was a monster - close to 2'. Dad was a cb male that unrolled at 8". One of the females is quite a bit smaller then the other, she could be a midget, but given she's already pushing a foot I'm going to say neither are midgets, as both were about the size of the girl pictured at just a few years old.......