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Guide to Leopard Gecko Morphs and Genetics
Note: This guide is merely intended to be an explanation of the
basic morphs and geneticsbehind Leopard Geckos. Some traits are
controversial among Leopard Gecko enthusiasts dueto their
variability and subjective nature. The descriptions listed here,
especially for polygenic
traits, is simply my interpretation based on my experience as
well that of other breeders inaddition to a perceived "majority
opinion". This is not intended to be an all-inclusive list.
Definitions:
Simple Recessive: a trait that must be passed on by both parents
for it to show up in theoffspring. Animals that carry recessive
traits but do not express them are referred to as being"het"
(heterozygous) for that trait.Polygenic: also known as "line bred"
traits. Animals expressing certain desirablecharacteristics are
selectively bred to each other in hopes of reproducing and
improving thosecharacteristics.Co-Dominant:a trait that can be
passed on by either one or both parents and be visible in the
first generation of offspring. Co-Dominant traits can also yield
a "Super" form if inherited fromboth parents.Line-Breeding:
breeding related animals together to intensify desired traits
Out-Crossing: breeding unrelated animals to introduce new traits
or to increase geneticdiversity and prevent genetic
defects.Phenotype: the actual, visible appearance of an
animalGenotype: the genetic composition of an animal, regardless of
appearance.Heterozygous: an animal that carries a recessive trait
but does not express itHomozygous: an animal expressing a recessive
trait
*Images* All pictures were taken by me of geckos either in my
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produced. Please do not use them for other websites and
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AlbinosThere are three known strains of albinism in Leopard
Geckos that are incompatible with eachother. Albinos are generally
recognized by their lack of black pigment. Having red eyes is not
arequirement in Leopard Geckos to be considered an albino. All
three strains of albino are simplerecessive traits.
Tremper Albinos are usually characterized by their light-colored
eyes and tendency to have brownishmarkings on them. They were the
first strain of albino Leopard Gecko discovered, and are also
themost common of the albinos. Some variations of Tremper Albinos
have pink eyes, but they may fadeto a light silver color with
maturity.
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Rainwater Albinosare also known as "Las Vegas" Albinos. I use
the two names interchangeablybut they do describe the same strain
of albino. Rainwaters tend to be the smallest of the albinos,
andalso have the darkest eyes. Many Rainwater albinos are lighter
in color than the other albinos, butmore color is being bred into
them so it is not a definitive characteristic.
Bell Albinosare well-known for their light pink-colored eyes
visible from birth throughadulthood. Some of them tend to have a
greater amount of small brownish spots, and some also havegreater
amounts of lavender coloring on them. Bell Albinos are the "newest"
strain of albinismdiscovered in Leopard Geckos.
Patternless, short for "Murphy's Patternless" is occasionally
referred to as a Leucistic LeopardGecko. This is morph is another
simple recessive trait. They are known for their lack of pattern
asadults, and as babies they have a unique spotted
appearance--especially around the shoulder and headarea. The color
of a Patternless can range from grays to a greenish color over the
whole body, but
most will have a purple-gray tail. Through selective breeding,
some breeders have managed to bringout the orange coloring at the
base of the tail ("carrot tail").
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BlizzardLeopard Geckos are similar to Patternless specimens in
appearance since they lack any ofthe typical spots and banding seen
on other leopard geckos. Blizzards range from pure white to
shades of gray, occasionally marked by varying degrees of a
yellowish shine on theirbodies. Blizzards do not have any visible
pattern at any stage of maturity, and do not exhibit a
noticeable amount of "carrot tail" like some Patternless Leopard
Geckos. Blizzards can also fluctuateslightly in their darkness or
lightness, and are thus referred to as "mood geckos" by some. Like
theAlbinos and Patternless, Blizzards are a simple recessive
trait.
Patternless Albinosare Leopard Geckos that exhibit both the
Patternless trait as well as one of thethree strains of Albino.
They look very similar to Patternless specimens, although their
bodies are ashade of yellow instead of grey or green and their eyes
are the color of the Albinos. They are adouble recessive mutation,
and can exist for all three strains of albino. Rainwater
Patternless andTremper Patternless Albinos are commonly available,
but at this point Bell Patternless Albinos have
yet to be produced to the best of my knowledge.
Blazing Blizzardsexhibit both an Albino trait as well as the
Blizzard trait, and are another doublerecessive mutation.
Essentially, they look just like Blizzards except they lack any
shades of
grey. They are usually solid white geckos, but like the
Blizzards, they can have varying degrees of a
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yellow overcast on their bodies. Both the Tremper Blazings and
Rainwater Blazings are available onthe market, but to date only one
Bell Blazing has been produced.
Red Stripes, Bold Stripes & Junglesare considered by many to
be polygenic traits, although someclaim that stripes tend to act
like a recessive trait. Junglesare characterized by their broken
bands of
pattern and no two are identical. Bold Stripes appear similar to
Jungles, although the dark pigment
runs only along the outside ventral surface of the animal's body
and tail. The amount of striping canvary, and some geckos will have
a striped body without a striped tail and vice versa. There also
exists
a Reverse Stripemorph which has the darker pigment running down
the spine of Leopard Geckos inone line. Red Stripeshave been
selectively bred to produce a mostly yellow or orange gecko
with
two reddish stripes down the dorsal surface of the Leopard
Gecko. These stripes can vary in intensity,and frequently don't
show up until the gecko is six months old. Baby Red Stripes usually
have a darkbrownish color where the stripes will later come in, and
adults' stripes may fade back to a brownishcolor once they have
reached maturity. The Red Stripe either has been, or is currently
beingintroduced into the Albinos to produce albinos with the red
stripes down their backs.
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Hypomelanistic, Super-Hypo & "Baldy"are terms used to
describe the lack of dark pigment onnon-albino Leopard Geckos. A
Hypomelanistic Leopard Gecko displays a greatly reduced amount
ofdark pigment over its body, although some spots may be present. A
Super-Hypo is essentially aHypomelanistic that completely lacks any
spots on its body. "Baldy"is a term used to describeLeopard Geckos
that also lack the pigment spots on their heads, although most if
not all "Baldies" arealso Super-Hypos. All of these traits are
regarded as polygenic or line-bred, and usually don't showup until
the animal is maturing. Babies that exhibit spots or bands after
hatching will loose thosemarkings if they are a Hypo, Super-Hypo or
"Baldy".
Tangerine, "Carrot Tail" & "Carrot Head"describe varying
degrees and locations of orangecoloration on a Leopard Gecko.
Animals labeled as Tangerine(or "Tang" for short) will have
orange
as a background color as opposed to the typical light yellow
color seen on normal leopardgeckos. The intensity of the orange
color may vary from a yellow-orange to nearly red on somespecimens.
"Carrot Tail"is a term used to describe a Leopard Gecko that has an
area of orange thatstarts at the base of their tail and continues
toward the tail's end. The amount of "carrot" varies fromjust a
small band at the base of the tail to a solid orange tail seen on
some extreme specimens. The
usage of the term "Carrot Tail" is usually reserved for animals
with at least 1/4 of their tail being
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orange. "Carrot Head"is a trait characterized by orangey spots
on the top of a gecko's head and isusually exclusive to Tremper
Albinos. All of these traits are considered to be polygenic or
line-bred.
Hybino Leopard Geckosare essentially the result of combining the
recessive albino traits with thepolygenic Hypo and Super-Hypo
characteristics to produce Albinos with a solid or almost
solidyellow to orange body color with varying amounts of
carrot-tail and tangerine. These are referred to
as "Sunglows"by some people. Hybinos can be created for each of
the three strains of Albino, andcan vary just as much as the Hypos
and Super-Hypos.
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Giant & Super Giantare traits believed to be co-dominant
that affect the size of Leopard
Geckos. This trait originated in Tremper Albinos and is usually
not used for the other strains ofalbino even if the animal falls
within the weight range depicted by the "standards" established
forGiants and Super-Giants. The Super-Giants are the largest
Leopard Geckos, with a record weight of156 grams recorded.
http://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperGiant2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperGiant.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/GiantHypoTang1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainwaterHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/BellHybino2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/BellHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperGiant2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperGiant.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/GiantHypoTang1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainwaterHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/BellHybino2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/BellHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperGiant2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperGiant.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/GiantHypoTang1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainwaterHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/BellHybino2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/BellHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperGiant2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperGiant.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/GiantHypoTang1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainwaterHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/BellHybino2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/BellHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperGiant2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperGiant.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/GiantHypoTang1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainwaterHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/BellHybino2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/BellHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperGiant2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperGiant.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/GiantHypoTang1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainwaterHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/BellHybino2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/BellHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperGiant2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperGiant.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/GiantHypoTang1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/TremperHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainwaterHybino1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/BellHybino2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/BellHybino1.jpg
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Line-Bred Snowsare Leopard Geckos that have been selectively
bred to reduce the background colorto a white or near-white color.
An exceptional Line-Bred Snow would be black and white, with
nonoticeable yellow coloring on them. As their name suggests,
Line-Bred Snows are a polygenic morph.
Mack Snow & Mack Super Snoware co-dominate morphs that
reduce or eliminate the yellow andorange color seen on many Leopard
Geckos. Mack Snowscan be black and white, although somespecimens
show varying degrees of yellow after having been out-crossed. Mack
Super Snowsare
characterized by their unique, high contrast black and white
pattern and their solid black eyes. Thispattern does not present
itself on a hatchling Leopard Gecko, but usually develops within a
month orso. Hatchling Super Snows are similar in appearance to
blizzards. The Super form can be thought ofas a recessive trait,
since both parents must contribute a Mack Snow gene to produce Mack
SuperSnow offspring.
Various Morphs & Combination
Raining Red Stripesare a relatively new morph that resulted from
combining a Rainwater Albinowith a Red Stripe. Exceptional
specimens have two unbroken orange-red stripes running down theback
of the gecko and a fully-striped tail.
http://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackSuperSnow1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackSnow2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackSnow1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackSnow3.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackSuperSnow1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackSnow2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackSnow1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackSnow3.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackSuperSnow1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackSnow2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackSnow1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackSnow3.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackSuperSnow1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackSnow2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackSnow1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackSnow3.jpg
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Mack Snow Patternlessare Leopard Geckos that exhibit both the
recessive Patternless trait as wellas the reduction in yellow,
orange & red pigment from the Mack Snows. As hatchlings and
juveniles,they show the slightly spotted pattern seen on young
Patternless, but this fades away as the geckosmature.
Mack Snow Albinois the result of combining one of the three
types of Albino with the Mack Snowgene. As hatchlings, the yellow
color of the albino is replaced with white, but as the gecko
maturessome yellow starts to appear, resulting in a pastel colored
Albino.
Mack Super Snow Albinois basically the Mack Super Snow version
of the Mack Snow Albinosmentioned above. Like the Mack Snow
Albinos, these can be created for any of the three types of
Albino. They exhibit the same pattern as a Mack Super Snow, but
the black is replaced by shades ofbeige or tan. Mack Super Snow
Albinos have solid colored eyes which are very dark on Tremper
andRainwater specimens, and solid bright red on Bell Albino
specimens.
http://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/SnowBell2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/SnowBell.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackPatternless2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackPatternless1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainingRedStripe2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainingRedStripe1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/SnowBell2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/SnowBell.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackPatternless2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackPatternless1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainingRedStripe2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainingRedStripe1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/SnowBell2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/SnowBell.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackPatternless2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackPatternless1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainingRedStripe2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainingRedStripe1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/SnowBell2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/SnowBell.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackPatternless2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackPatternless1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainingRedStripe2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainingRedStripe1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/SnowBell2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/SnowBell.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackPatternless2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackPatternless1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainingRedStripe2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainingRedStripe1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/SnowBell2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/SnowBell.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackPatternless2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/MackPatternless1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainingRedStripe2.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainingRedStripe1.jpg
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A.P.T.O.R., R.A.P.T.O.R. & "Eclipse"are essentially three
variations of the same Tremper Albino
morph. A.P.T.O.R. stands for Albino Patternless Tangerine
Orange, and R.A.P.T.O.R denotesspecimens with red eyes. The
"patternless" trait affecting these morphs is not compatible with
the
Murphy's Patternless. The "Eclipse" refers to a non-Albino
variation of this morph and isoccasionally used to refer to Leopard
Geckos with "Snake Eyes". More information can be found
atwww.LeopardGecko.com
"Snake Eyes", as pictured here are basically Leopard Gecko eyes
that have solid black areas in theiririses. Many such specimens
will have one or both eyes half black, while others will show
anywhere
from 1/4 to 3/4 of their eyes solid black. The genetics behind
this trait are still suspect, but it doesseem to occur the most
often with Blizzard and R.A.P.T.O.R morphs. Some breeders have
also
http://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/Eclipse1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RAPTOR1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/APTOR.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainwaterSuperSnow1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/Eclipse1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RAPTOR1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/APTOR.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainwaterSuperSnow1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/Eclipse1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RAPTOR1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/APTOR.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainwaterSuperSnow1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/Eclipse1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RAPTOR1.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/APTOR.jpghttp://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/RainwaterSuperSnow1.jpg
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produced albino animals with "Snake Eyes". Occasionally the term
"Eclipse" is also used to describethis trait.
http://www.paulsagereptiles.com/images/Leopard_Gecko_Morphs/Snake-eyedRWBB1.jpg