The tranny gene can be carried by somebody without them being symptomatic. This is not just a tranny gene thing but also just a gene thing. Carrying the gene for an affliction doesn’t mean you’ll get it (or experience it at max intensity even if you do)… but your kids might… that’s just how it works… it’s possible for cis parents to give you the tranny gene too, tho being trans does increase your likelihood of having reppers of various dysphoria threshholds up the family tree no doubt…