T-Positive Albino

It is one of the oldest and best-known genetic mutations in blood pythons.   

This morph is a recessive mutation, meaning that both parents must carry a copy of the gene (Heterozygous), and they both have to inherit that copy to their offspring for the animal to express the Albino trait (Homozygous) visually. The "T" stands for Tyrosinase. A crucial enzyme in the melamine production chain that helps synthesize melanin (black pigment) through its interaction with an amino acid called Tyrosine. 

In this case, the "Positive" indicates that Tyrosinase is present and functional, promoting the production of the precursors of melanin (black pigment) known as "melamine-related pigments." Shades of gray and purple can be found in T+ albino animals but NEVER actual black color. 

The albino gene (both T+ and T-) is essentially a color-modifying mutation, having no influence on the snake's pattern. 

Like in the “Wild Type” category, some breeders have established specific line breed lineages of T+ albino. These lines include VPI red-albino, Cherry Bomb, Tomato Bomb, Red X, and Purple Passion. The addition of line-bred wild-type bloodlines can enhance the appearance of the T-positive albino gene. For example, T+ albino “Lyly” animals have darker purples and deeper reds. 

The T-Positive Albino also comes in a Yellow phase. The animals from this line never get red. Instead, they keep their yellow and purple colors through adulthood. You can see an example of this line on VPI's website.