How well did holding back work out for the banana gene?
It's a recessive gene. It takes far more time to reproduce. Domimant type morphs can rapid breed males and keep reproducing them and be able to identify them. Recessive have to have a het female up to size to even have a shot at reproducing them. Far more time, much more uncertainty (pos hets), and only a 1 in 4 shot with het x het breedings.