I have no personal experience, but I have friends who have bred them and talked to many breeders who have. Also many reports are scattered across the internet. So with the information available....

Quote Originally Posted by kaitala View Post
When a "male maker" or "female maker" is bred to a normal, what is the sex ratio of ALL of the litter? Is it near 50/50 or is it gender heavy in favor of the sex of the b/cgs?
sex ratio is normal, just with say a male maker, the males will be bananas most of the time thus the non-bananas will mostly be female.

Quote Originally Posted by kaitala View Post
Where are we actually getting the data for this "male/female maker"? How many breedings are required before one can say it's a gender maker, not just luck of the draw on one clutch?
If the male banana came from a male banana, it is a male maker
If the male banana came from a female banana, it is a female maker
If you produce a female banana from a female banana, male maker, or female maker, it will produce as expected like any other gene.

That has been proven over and over through many breedings. No proving out needed, just need to know what parent the gene came from. Someone who verbally shared some numbers with me in the past was brock wagner, but every banana breeding has confirmed the above statement that I have seen.