Reptile Morph & Gene Library

Reptile Morph & Gene Library — Inheritance, Zygosities and Descriptions

Morph Library

Every gene on Breeders Direct — what it is, how it is inherited, and which species carry it

Co-Dominant Leucistic

Co-Dominant

Example: Ball Pythons (Blue-Eyed Leucistic [BEL] & Black-Eyed Leucistic) The BEL complex includes co-dominant genes like Mojave, Lesser, Butter, Russo, Phantom. If an animal inherits one copy, it has a different morph (e.g., Mojave). If an animal inherits two copies of compatible genes (e.g., Mojave × Mojave), it becomes a super form—a pure white "Blue-Eyed Leucistic" (BEL) or "Black-Eyed Leucistic" (depending on the genes).

Co-Dominant: One copy is visibly expressed. Two copies produce a distinct "super" form, which differs from gene to gene — see the individual gene for what its super looks like.

Comes in Super Visual
Species Ball Python

Phantom

Recessive

A hypomelanistic variant that results in a faded, grayish, or pastel look.

Recessive: Requires two copies to express

Comes in 100% Het 50% Het 66% Het Visual
Species Ball Python Corn Snake Leopard Gecko