The lyretail gene is a particularly bizarre one. As Krib said it's usually recessive but it shows up in the weirdest places sometimes. My LFS has lyre mollies at the moment with normal gonopodiums that I can only assume are able to mate, but most lyretail strains are only fertile if regular fin males are used. I had a regular female sailfin molly throw a heap of fry before I even knew that there was a lyretail strain of mollies, and a few months later, whoops, they all sprouted lyretails. It took over two months for mine to develop.
What's so bad about a 'newbie forum' anyway? I don't even want to think how many fish I would have killed if I didn't have a forum full of experienced people to help me through illnesses, tank crashes etc. Those of us who have the experience and the knowledge should be willing to share it. It's not like there aren't people here who are willing and able to answer advanced questions, even if there aren't many of them.