You know I just looked at that and I think I agree with you Oahu that it doesn't answer the questions as easy as I thought...

1. Can't tell the sex of a plant until it is starting to bloom if you have started from seeds...clones hopefully you know already what sex they are

2. I don't know anything about cloning.

3. You have to put a male and female plant together so the male will pollinate the female and she makes seeds instead of resin.

Get some reading under your belt guy.....do a google search on growing cannabis and you'll get tons of info..