Not sure if there are more than one type of marble genes - never really looked into them (not a fan). Oh, just to clarify; I've never looked into fancies as well - just concluding the few times I've bred them. But I do notice that sometimes marbles work in certain ways and thus is associated with certain color pattern. My SB (3 different lines from 3 different breeders in 3 different islands) all carry marbles - the "dream" blue dragon (white body with blue fins) is also associated with marbles. So it is possible that certain patterned fancies are also associated with marble genes, though the two genes are different but they may have to work together to create certain patterns.
Perhaps someone who has worked more with fancies could shed more light on this.
It is believed that male passes more color while female passes more form. I used to believe this, but now I have doubts. Recent breeding shows that form and color can go either way, depending on who's genes are stronger (more fixed). However I could never improve form using average quality female. So, though I still go by this myth and will advise it, I don't expect too much.