F1! Good Question!
F1 Males, I see more of the mother in these crosses with Stabilty lowered I end up culling 75% of stock in about weeks 1-3 of 10on-14off.
BUT the other 25% F2 seem to make up very a Stable F3. Just Dont feel bad about Culling. they are not animals.
F1 Females are flowed out...