lets see if i remember all this... XYY, X-, XXY, XX, XY, and hermaphrodite?
hermaphrodites are the only ones where a decision has to be made as to which sex will be chosen, and in the past it was often chosen by the predominate physical characteristic, which didn't always match up with the predominate hormonal balance, which is where the basis for their gender identity disorders stemmed from.
i believe today, blood work is done before making the decision in efforts to minimize the likely hood of the individual developing a GID.