Genetics confusion

[JLC]

Paulh lesser is not a het gene. It's coDOMINANT which means it's going to show. Here are your het genes.
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Paulh is not wrong. The term "het" doesn't indicate whether or not a morph is going to "show". All "het" means is that one gene within a pair of genes is different from the other. One is normal, and one is altered in some way.

Because albino is a recessive trait....when one gene is albino and the other gene is normal...the animal LOOKS normal, but can be called "het albino."

In the same way, a "lesser" gene is just one of the pair...the other gene is normal. If you have two lesser genes at the same pair, then you get a blue-eyed leucistic. Therefore, it is equally correct to call a lesser ball python "Het blue-eyed leucistic".

Yellowbelly = het ivory

And so on...

Homozygous means "the same"....the pair of genes are the same. Albino, pied, BEL, ivory....they're all homozygous examples of their morph, regardless of whether they are considered recessive or co-dominant.

Heterozygous means "different"...the pair of genes are different. One is normal and one is altered. Het albino, het pied, het BEL (lesser), het ivory (yellowbelly)....all equally correct ways to describe them.