The more insightful theory of the platty daddy is that it is also a part of the BEL complex and is co-dom (dominant), therefor the lesser cannot carry the gene without expressing it in the form of the platty daddy. Otherwise people would be breeding two lessers together to get plattys, which has never happened.
All of the lessers currently existing came from the platty daddy, so from all of the breedings it should've happened, but it only happens from the normal looking offspring back to lessers. Similar to the phantom genetics in the oddity of the BEL complex.![]()