Bearded Dragon Morphs and Breeder Lingo, Decoded

In the wild, a bearded dragon takes its color from the ground it lives on: browns and tans, lifted with red or gold where the soil runs that way. Every morph a breeder sells is a departure from that look.

One Gene or a Whole Line

Morphs come in two kinds, and the difference decides what a pairing can produce. A single-gene morph follows the textbook rules of inheritance, so its odds can be worked out before the eggs are laid. A line-bred color is polygenic, shaped by several genes at once, and it does not follow those rules.

The line-bred colors are red, orange, yellow (sold as citrus), white, brown and purple, along with the tiger and S patterns. Red, purple and brown dragons, for example, come from pairing two dragons of that color to get babies of a deeper shade. How much of the color a given dragon shows depends on its lineage, its parents' coloring and its surroundings, so a color name on a listing is a description, not a guarantee of what the babies will be.

Red runs from fire-engine red through dull maroon to almost pink, with the body usually a shade darker than the head. The more generations of red-to-red pairings behind a dragon, the deeper its red can get. Dragons that are red nearly all over are sold under line names such as blood red and ruby red. Like every color line, these are names for a breeder's red, not separate genes.

Genetic stripe, which some listings call unbroken lines, is the pattern whose name oversells it. The dragon has a clear stripe down each side of the spine, from the neck into the tail. The trait behaves like a line-bred pattern, and one clutch can hold clean stripes, weaker stripes and dragons with no stripes at all.

The Single-Gene Morphs

Hypo and Translucent: Pigment

A hypo (short for hypomelanistic) makes less melanin, the dark pigment. It hatches bright and fades as it grows into a pastel adult, anywhere from pinks and yellows to pale blue, soft orange or close to white. Check the nails: a hypo's are clear. Hypo is recessive.

A translucent (or trans) has no white pigment, so its colors look deeper and a little see-through, which breeders call "gummy". A baby's belly shows blue through the skin, sometimes with a blue tint above the eyes, and the side spikes are often clear. Its eyes can be solid black or normal, so eye color proves nothing. As an adult it keeps brighter color over its whole body, its beard scales can look see-through, and its belly stays see-through with a blue hue. Translucent is recessive, and a dragon is either translucent or it is not: there is no partial form.

Leatherback, Silkback and Phantom Leather: Scales

A leatherback has small, soft scales along its back and back legs, so it feels smoother in the hand. Breeders call it incomplete dominant: one copy of the gene makes a leatherback. The Italian form is smoother and more even across the back, and the American form is less consistent, with some rough scales left. Two leatherbacks bred together can produce a silkback, the form with two copies. On average, a quarter of that pairing's babies are silkbacks, half are leatherbacks and a quarter are normal.

A silkback has no scales anywhere on its body, side spikes included, and no femoral glands. Its teeth are reduced, and it hatches with longer claws. A 2017 study traced the trait to a small deletion in a gene called EDA and found that the scaleless dragons sold as pets carry two copies of it. Most silkbacks grow pseudoscales as they age.

Phantom leather is a separate, recessive smooth-scale gene. These dragons are smooth along the back and sides with nearly normal scales elsewhere. Two phantom leathers produce a whole clutch of phantom leathers and never a silkback. To tell the two smooth morphs apart, look at where the smooth scales stop: a leatherback is smooth on the back and back legs, and a phantom leather on the back and sides, with nearly normal legs.

Dunner: Scale Direction

A dunner has conical scales that do not lie flat in one direction, most of all on the belly. The jumbled scales change how the pattern shows: the belly swirls, and the tail carries random spots that fade with age instead of stripes. Dunner is dominant, so one copy is enough, and it changes the scales alone. A patternless dragon can be a dunner too.

Zero and Witblits: Patternless

A zero carries a recessive masking gene that hides both color and pattern, leaving a silver gray dragon. Hatchlings can show a faint pattern that sheds out as they grow, so a baby with a faint pattern can still be a zero.

A witblits carries a different recessive masking gene. It is just as patternless, but its color is muted to an earthy brown, close to orange in carefully line-bred animals.

Paradox: The One You Cannot Breed For

A paradox carries patches that contradict the rest of its body: a smudge of another color, a mismatched eye or a split straight down the middle. It is not a standard dominant or recessive trait. Paradoxes appear at random, each one is different, and pairing two paradoxes gives no promise of a third. Some are sold as purple paradoxes, though not every paradox shows purple. Breeders also call them mosaics or chimeras. The usual explanation is that the dragon carries two sets of cells with different genes, either from a single embryo (a mosaic) or from two embryos that fused into one (a chimera).

What Smooth Skin and Pale Color Cost the Dragon

Fewer scales means faster water loss. In a lab study, silkbacks lost water by evaporation at about twice the rate of normal dragons, and leatherbacks were closer to silkbacks than to normal dragons. Those two are the morphs to watch for signs of drying out. The same study found that all three types (normal, leatherback and silkback) chose nearly the same temperatures, within about 2°F, so a smooth dragon wants the same heat as any other.

Light is the other difference. Hypo, translucent and silkback dragons are likely more sensitive to strong UVB, so for those three the UV index at the basking spot stays at 3.0 or lower. That means setting the UVB tube and its distance from the dragon for the morph in front of you.

Reading a Listing: The Terms, Defined

• Normal: a dragon with no morph, showing the wild look, and the cheapest kind to buy.
• Het (short for heterozygous): the dragon inherited a different version of a gene from each parent, so it carries one copy. With a recessive morph, a het looks normal, because one working copy is enough to hide the trait. "Het trans" means a dragon carrying one copy of translucent.
• Homozygous: the dragon inherited the same version of the gene from both parents, so it has two copies. A two-copy leatherback is called a super: a silkback is a super leatherback.
• Recessive: the trait shows only when the dragon has two copies. Hypo, translucent, zero, witblits and phantom leather are recessive.
• Dominant: one copy is enough for the trait to show. Dunner is dominant.
• Incomplete dominant: the trait shows with one copy and shows differently with two. One copy of the leatherback gene makes a leatherback; two make a silkback.
• Visual: the trait shows on the dragon. "Visual hypo" means the dragon is a hypo, not just a carrier. A dominant morph is always visual.
• Visual het: the exception to "a het looks normal". A leatherback carries one copy of its gene, and that one copy shows, so breeders call it a visual het.
• Masking gene: a gene that hides the pattern, the color or both. Zero and witblits are both masking genes.
• Line-bred (or polygenic): a color or pattern shaped by several genes at once and deepened by pairing dragons that show it, with no odds that can be worked out.
• 50% het: one parent is a het and the other has no copy. Each baby has an even chance of carrying the gene.
• 66% het: both parents are hets. A quarter of their babies show the trait, half carry it and a quarter do neither, so of the babies that do not show it, two in three are hets.
• Poss het (short for possible het): the dragon may carry one copy of a recessive gene, and nobody can tell by looking. On a listing it comes with a percentage, as in "66% poss het trans".
• 100% het: the dragon is certain to carry one copy. It comes from pairing a dragon that shows a recessive trait with one that has no copy: every baby gets one copy from the visual parent, so every baby is a het.
• Double het: a dragon that is het for two different genes at once, such as hypo and translucent. It shows neither trait but can pass on either.
• Proven: a het confirmed by breeding. Paired with a dragon that shows the trait, a true het gives about half of its babies the trait, so a single baby showing it proves the parent carries the gene.

The percentage is the chance that this dragon carries the gene. It is not a measure of how much of the trait it has.

Combination Names

Listings string the genes together, as in "Hypo Dunner Zero". Masking genes combine with the pigment morphs: a hypo zero is white, a translucent zero a purple gray and a hypo translucent zero a dusty lavender. Some pairings get their own name. A wero is a witblits and a zero together, and it is patternless like both.

One listing caption names its dragon "Wero (Witblits + Zero)" and then "Hypo 66% Poss. Het Trans". Decoded: the dragon shows both masking genes and hypo, and it has a two-in-three chance of carrying translucent. In the photo above that caption, the dragon is close to pure white, with no pattern anywhere.

What a Morph Name Can Promise

A morph name is a claim about genes, and only the single-gene names come with odds that can be worked out. A color line, a genetic stripe or a paradox describes the dragon in front of you and promises nothing about its babies. A hypo, translucent or silkback needs the gentler UVB, and a silkback or leatherback the closer watch on its water.

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Sources & Further Reading