If the Banana male is a "male maker"... Then 95% of the banana offspring will males... 95% of the non-Banana offspring will be female... all of the banana males produced would all be male makers...
If you breed a female Banana you can produce males or females at normal rates... but the males that come from the female are the "Female Makers... they will produce 95% Banana females and the non-Banana sibs will be 95% Males... any male Banana produced by a "Female Maker" male will be a "Male Maker"...
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Jason Amos

Lots of Ball Pythons
1.1 Staffordshire Bull Terriers