No, although most are female. We were intrigued when our most prominent child alter apparently 'grew up' recently (I don't really know how or why these things happen, but it felt like that was what happened and I asked and she?he? said she?he? was 17 now. And I say she?he? because we always felt there were two of the same alter - one male and one female - but we've never really known for sure.) Anyway, I asked what was the best thing about being 17 and she?he? replied "Now I can get a girlfriend." And I was like "... 0_o ...Oh. Okay."
I, being very female and (I thought?) straight, don't know what to make of that.
(ETA I mean to say I haven't been aware of any lesbian alters before, or had to deal with any male alters that wanted to have a relationship. This is very much a new turn of events for our system).

Question:
Do you currently have a T?