it is the only morph known to be sex-linked.


producing a male banana or coral glow is much more difficult. males have the sex chromosomes WW and females have WZ. Coral glow sits on the W. females need the gene only once to be visible, basically they get one for free because the Z chromosome is completely different. males need the gene twice, once from each parent, to be visible banana / coral glow.

(in humans its opposite, with men having xy and women xx. in humans, for example green-red colorblindness is a recessive on the x-chromosome, so its common in men because men will be green-red blind if the one x-chromosome they have carries it. Only women can have normal vision and carry the gene around at the same time, and boys can be red-green blind with both parents having normal color vision. Girls will never be red-green blind if both parents have normal color vision.)

this has serious implications on breeding and the odds of clutches, but by now people have figured out how to produce males in quantities. Depending on the parents, you can get clutches that are 100% coral glow (male coral glow to female coral glow), clutches where all males look normal but all females are coral glow (male coral glow to female normal), and clutches where all offspring looks normal (normal male to female coral glow). And to complete the story, male het coral glows exist, female het coral glows do not exist.


its likely that every breeder working with banana or coral glow is also producing males by now. you can also start a project with females, and later produce your own visible males, by breeding back the normal-looking male offspring to visible females.