Noo, not quite ...
By my understanding, it's the other way around.
The pearl comes from "hidden gene" woma x "hidden gene" woma. Most of them die due to severe neurologic impairment (can't sit upright, spin constantly, can't eat, fail to thrive). Evidently the one that OWAL was shown by Kevin is alive and well, though why this particular one seems to have survived is unclear.
AFAIK, the "regular" woma that most people work with is most likely simple dominant (ie, the homozygous "super" form looks exactly the same as the heterozygous form) though I haven't heard any suggestive "proof" one way or the other.