Green and red colored seeds are recessive and dominant trait respectively. Out of F1 and F2 in which generation will the green seed appear, if both parents are not hybrid.
Since it is given that green is recessive and red seeds are dominant, hence green colour of seeds will reappear only in F2 generation This is because, both parents are not hybrid for this trait, (as given) and hence the two recessive genes will come together only in F2.