Pumpkin Spice Latte

Harlequin

Harlequin is a morph defined by bold lateral patterning with high contrast between the base color and pattern elements. It is produced through multiple interacting traits — a classic example of epistasis, where non-allelic traits combine to create a distinct phenotype. Breeding like to like over generations intensifies expression and pattern coverage.

High Expression

Expression level in crested geckos is influenced by polygenic traits — multiple genes each contributing a small effect to the overall phenotype. Line breeding animals with similar high-expression traits is how breeders 'stack' these polygenic contributions to produce offspring with exceptional color saturation and pattern coverage.

Phantom / Harlequin Combo

Phantom is a recessive trait that, when combined with Harlequin, creates a striking combo morph. Phantom can lose dominance on the laterals and tail base, where other traits like Harlequin patterning push back through — a behavior described in Foundation Genetics as a trait 'acting like' or 'behaving like' codominant in those regions.