yes. 

Black, Yaldar  are (that explains why all three wear glasses when working). Violet and Larissa are carriers. Ritta isn’t affected. 

Don’t hold everything to be scientifically 100% correct though. it’s fiction science lol

EDIT: original answer had Violet up with Yaldar and Black. I keep going back and forth between her being affected or carrier. Both ways have interesting results on the story of her and her kids. so yeah..

If she was affected, both Larissa and Ritta are carriers. If not, only Larissa is carrier and RItta doesn’t carry the gene.