Herm genetics are not breedable as traits - they are hardwired into every plant every strain for millions and such years now. Its an awesome survival tactic in the wet and bad years since the distance pollen has to travel is tiny and the futher the distance the less chance.
You can herm a plant - grow the hundred seeds produced and find not one herm. Stuff is largely down to skill and selecting a strain that treats you well not breeders or fem seeds.
Mj also seems to suffer no loss of potency or genetics by constant selfing and so you can keep selfing a herm and its offspring bitch seed and still keep getting quality dank.
New growers should take the hit of seeded bud - still quality bud and whats a few seeds unless your the kind of guy where small insignificant problems see you flying into fits of rage and killing innocents - if your that guy then dispose of that herm and all your others immediately, i warn you that many have zero plants and bud at end of grows for removing the herms as they all.might if one has.
Aussie has given good advice..turf the Herm as you have other plants...
That said, the Hermie will give you feminized seed...the problem, is that either the genetics or the circumstances forcing the plant to Hermie..mean pollen will produce feminized seed..but that seed is likely to Hermie too...(not a good trait)
Feminized seed is produced by breeders who purposely force a female to Hermie, usually with collodial silver. Using this method as a catalyst seems to dramatically lower the frequency that Hermie traits are passed on through to the next generation.
Cheers
Mr Toad