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

Leatherback

Co-Dominant

Reduced dorsal scalation (smoother texture)

Leatherback × Leatherback produces Silkback, which is scaleless and carries welfare problems including shedding difficulty, skin damage and heat sensitivity.

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 Bearded Dragon

Leopard

Co-Dominant

Dark enhancing pattern mutation

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 Lovebird Zebra Finch

Lesser

Co-Dominant

Member of the BEL complex; similar to Butter

BEL complex allele interactions can produce leucistics

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

Lilly White

Co-Dominant

Produces lots of white/cream coloration. Hatchlings often have white tails, white lower lateral scales; as they age, more white spreads.

Lilly White × Lilly White is not a viable pairing — the homozygous form dies in the egg. Pair Lilly White to a normal.

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 Crested Gecko

Long Fin

Dominant

Extended fin rays; fins appear longer and flowing.

Dominant: Single gene sufficient to express

Comes in High Expression Low Expression
Species African Grey Goldfish Zebra Finch

Mahogany

Co-Dominant

Darkens pattern, good for darker combos.

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

Metallic / Iridophore

Dominant

Shiny, reflective scales giving iridescence

Dominant: Single gene sufficient to express

Comes in High Expression Low Expression
Species Lovebird

Mocha

Co-Dominant

Dark brown and rich earthy tones.

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 Eastern Hognose Western Hognose

Mojave

Co-Dominant

Member of the BEL complex; produces BEL in supers or with compatible alleles

BEL complex allele interactions can produce leucistics

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

Monarch

Co-Dominant

Bright orange/caramel tones, similar in look to Ultramel.

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

Monsoon

Recessive

High-intensity pattern mutation causing chaotic pattern

Recessive: Requires two copies to express

Comes in 100% Het 50% Het 66% Het Visual
Species Ball Python

Mosaic

Polygenic

Patchwork multi-color pattern

Polygenic: Determined by multiple genes

Species Guppy Lovebird

Motley

Recessive

Elongated dorsal markings; belly pattern reduced

Recessive: Requires two copies to express

Comes in 100% Het 50% Het 66% Het Visual
Species Corn Snake

Mystic

Co-Dominant

Subtle gene on its own; important in Mystic Potion combo.

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

Oranda Wen

Polygenic

Head growth (wen) development

Polygenic: Determined by multiple genes

Species Goldfish

Orange

Line bred colour trait

Orange is a color trait—a visible characteristic (phenotype) based on pigmentation, such as feather color, scale color, or fur.

Line bred colour trait: A line-bred color trait refers to a specific color characteristic in animals that is maintained or intensified through line breeding.

Comes in High Expression Low Expression Visual
Species Bearded Dragon Domestic Canary Lovebird

Orange Dream

Co-Dominant

Enhances orange tones and cleans pattern

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

Palmetto

Co-Dominant

Incomplete Dominant

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 Corn Snake

Palmetto (Het)

Co-Dominant

Not written up yet.

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 Corn Snake

Paradox

Unknown

An unexpected mix of two different color morphs appearing randomly in blotches.

Unknown: This gene type is typically not reproducible.

Species Ball Python Bearded Dragon Leopard Gecko

Pastel

Co-Dominant

Enhances yellows and pattern contrast

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

Patternless

Line bred colour trait

Solid color, no contrasting pattern (spots, stripes, etc.). May have color variations but no distinct pattern.

Line bred colour trait: A line-bred color trait refers to a specific color characteristic in animals that is maintained or intensified through line breeding.

Comes in High Expression Low Expression Visual
Species Crested Gecko

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

Pied (Piebald)

Recessive

Large patches of white on the body due to lack of pigmentation in specific areas

Recessive: Requires two copies to express

Comes in 100% Het 50% Het 66% Het Visual
Species Ball Python Boa Constrictor Cockatiel Dog Reticulated Python