Carpet Python Morphs 

Coastal Carpet Python Base Morphs

Benjamin-Will Leary jag

Check out the Jag Combo Morphs here
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Jaguar, aka jag. (Morelia spilota mcdowelli)
This is one of the first genetic mutations that popped up in carpet pythons. This morph usually has a reduction in overall pattern and reduces the dark pigment and seems to increase the yellow pigment as well.
This morph originated from Jan Eric Engell. 
In 1994, after several years of breeding coastal carpet pythons, he produced an unusual looking carpet python.
In 1997 he named the morph the Jaguar and set out to see if it was recessive or incomplete dominant.
In 1998 he bred the jag to an unrelated female coastal carpet. Unfortunately, the clutch only resulted in 4 good eggs. However, one of the babies did turn out to be a jag.
Jan used the same pair in 1999 and produced 12 babies. Four were normal and eight were jags. All of these snakes went to the U.S. and they were big $$ back then.
It is an incomplete dominant gene with the super form being a Leucistic. Sadly, the homozygous form is lethal. There have been some cases where the leucistic has survived for a brief time outside the egg, but they always end up perishing within a day. It has been shown that the issue is with the development of the lungs. 
There are Neurological issues that are associated with this gene. This stems from a failure of certain cell types to migrate to the brain from the neural crest during embryonic development.
All jags have this issue.  The symptoms can be as mild as poor coordination or as severe as corkscrewing. The issues seem to present themselves when the snake becomes stressed. There are some jags that don’t show any signs and others that come out of the egg having issues. This condition doesn’t seem to affect the snakes' overall health since they eat, shed and breed without any issues. This is the same condition that you see in spider ball.

Baylin tiger- Owend by Eric Burke

Check out the Tiger Combo Morphs here
  Tiger (Morelia spilota mcdowelli)​​
This morph is basically a striped coastal carpet. They have a broad dorsal and lateral band. The lateral band would sometimes show as a stripe and other times as a series of ovals that went along the side. They had a really defined head pattern, it looked like it was drawn on by a sharpie. The original stock had a connecting neckband that connected to the head pattern. It had a very distinct look to it. It was different from the trip-stripe or striped coastals of the time. They didn’t seem to have as broad of a stripe and the head pattern wasn’t as distinct. 
It’s a polygenic trait in the early days this gene was thought to be incomplete dominant because 
Tigers are striped coastal carpets that descended from the James Neville line, which then was purchased and bred by Jason Baylin.
The Original line is from Nevell James bought in the early 2000s.  He had the original male from a guy named Richard Quick. Richard spent a lot of time breeding reptiles in Alaska. Richard sent one to Neville and Neville bred it with a coastal from East Bay Vivarium. It was tagged as a coastal when it came in and there was some debate on if it was coastal. It was accepted that it was a coastal based on the timeframe that it came in. Nevell produced some animals and he advertised them on Kingsnake. This would be the ad that I shared on MPR Facebook last week. Jason snatched up a pair and produced the first clutch that produced 100% striped carpets. This is where the confusion comes in that it was originally thought to be incomplete dominant.

Caramel- Owend by Owen McIntyre

Check out the Caramel Combo Morphs here

Red- Owend by Eric Burke

  ​​ Caramel/Super Caramel (Morelia spilota mcdowelli)​​
This is an Incomplete dominant trait. There is a super form called a super caramel. 
They hatch out red/brown color and usually has reduced dark pigment. As they age the red typically fades and they take on an increased amount of yellow. 
Cristos Skliris Had them pop up from a clutch of normal-looking coastals in France. Surprisingly the first ones were very black.
In 2003 Paul Harris acquired several pairs of Caramel Coastals from him. These babies were red in color with no noticeable black markings at all, only very fine brown edging to some of the pattern. Paul was quite confident that the trait would be reproducible as the babies looked different from the “normal" reds babies that are sometimes found in Coastal clutches.
In 2006 Paul bred a male Coastal Jaguar Carpet to a female Caramel. He hatched some normal looking Jaguars and Coastals as well as a Caramel Jaguar and caramel babies from that pairing. So it seems that the trait was incomplete dominant and he had hatched a double co-dom Caramel Jaguar! 
In 2007 he tried the same pairing again along with a second pairing, a male Caramel to a female Coastal Jaguar. Both clutches contained Caramel Jaguars and Caramels as well as normal Jaguars and Coastals.
He also bred Caramel to Caramel for the first time in 2007. The outcome from 19 eggs from this clutch was also consistent with it being an incomplete dominant trait, there were 10 Caramels, 5 normals, and 4 "Super" Caramels. The supers were even brighter than their Caramel clutch mates and completely lacked any dark scales or markings altogether.
In 2009 he bred a male super Caramel to a normal coastal and hatching all caramel babies, finally proving the mutation to be incomplete dominant.
 

 ​ Red  (Morelia spilota mcdowelli)​​
In order to have a good understanding of the red coastal, you must know about MBB.
Let’s talk real quick about what mbb stands for. 
The initials MBB stands for Madam Blueberry. MBB is believed to have started the red line of coastal carpets. In the early days, it seems that there was a lot of confusion about this gene and its mode of inheritance. Today, it isn’t much clearer. There are a few people, including myself, hard at work with trying to understand the genetics behind this amazing snake.
The MBB red animals are believed to be a hypomelanistic trait with varying degrees of expression. There seem to be levels of the red pigment expressed from coffee-colored animals to highly extreme red animals. Jason Baylin has produced a few of these extreme reds over the years and they do seem to be different from the red of the animals in the clutch.
The mode of inheritance seems to be polygenic and can occur when a genetic red animal is bred to a non-red unrelated one. Jason has had two males stay red into adulthood. He’s had unrelated pairings where the reds were average to not so nice and pairings of unrelated animals that yield the bright red offspring. He did my first related pairing (sib to sib) last year and got similar results to my unrelated pairing.
Erick Hernandez has been working with MBB red since 2012. He has done red x red, outcrosses, and backcrosses. He believes that red is a polygenetic hypomelanistic trait. With age, animals that fully express these genes tend to lose their black. Like a reverse IMG. 
Side note
I think people get confused because they hear us talk about Red tigers from Baylin's 07 red tiger clutch on Mpr. But the red that was used with that pairing was from a red coastal that came from Will Leary and wasn't related to MBB stock. that snake is completely outside of the MBB genetics.

Hypo- Owend by Paul Harris

 ​​ Axanthic  (Morelia spilota mcdowelli)​​

The Axanthic Coastal carpet python has been proven to be a genetic trait. The axanthic gene is a reduction or absence of yellow. The line originated in Sweden from normal-appearing Coastal carpets and fortunately proved to be inheritable. 
This line has also proven to be compatible with the Irian Jaya Axanthic Carpet line that originated in Poland.
There is some debate on the heredity of this gene. For the longest time, we have looked at this gene as a recessive but with more and more breedings being done the thought has changed to incomplete dominant. When you hatch out axanthics you see that some look Axanthic but there is another level. This is where the idea comes in that they are a “super”, and I use that name only to illustrate what I mean. Similar to a pastel and a super pastel that you find in royal pythons. 
To illustrates the problem people wrongly believe it's recessive therefore anything axanthic looking must be a visual axanthic.  As babies, the eye color is the only way to be sure. Axanthics have a pale bluish eye while the hets eyes are pretty normal.  It's even worse with jag hets as they can have blue eyes and still only be hets. 

 ​​​​ Hypo  (Morelia spilota mcdowelli)​​

This is the first new single gene carpet python mutation offered in the hobby for a good number of years and is great news for carpet python enthusiasts.
Paul Harris of UK Pythons started working with a pair of suspected hypomelanistic carpet pythons about 5 years ago, the animals were interesting looking and thus the project began. A few years ago Paul began a series of test breedings to answer all of these questions that surrounded this new gene. The results are that the new gene is incomplete dominant.

Albino- Owend by Kurt Walker

 ​​​ Albino coastal carpet python   (Morelia spilota mcdowelli)​​

This project is still in the early days. It’s being worked on by Kurt Walker in Australia. 
It looks like it’s a recessive gene. The two he currently came from an F1 het pairing, both small clutches of 7 and one albino in each clutch, so 25%.
The possibilities with this is amazing. You could make tons of different combos and still be working with M.spilota mcdowelli stock.
  

TO BE CONTINUED