Hey Bill, lookin great! I don't know about genetics, but I do know from experience that your smoke can double in quality just by taking the extra measures that you are. I had just plain old bagseed that I planted, and when it was done it was at least twice as good as the bag it came out of. I think thats the diff between caring about ur girls and just hoping they live LOL.
If ur sativa is anything like mine that bitch is gonna get massive. My skunk grew almost 3 feet in the first two weeks or so of flower. Thats how I ended up breaking it while moving...
She looks great, keep up the good work!