Speaking of the Masque gene: roughly quoting Charles Pritzel, from the 2011 Cornsnake Morph Guide- the masque gene, like all pattern genes, is highly variable. It may be undetectable or go unnoticed in females, and is treated as if it is fully expressed in males.
The ground color is expanded on the head, and the head making is a skull shape, with eyes the same color as the saddles. [particularly, in my example, look at the difference in width of the found-color band going between the eyes of the snake. Thin in the female, thick in the male]
Masque is thought to be dominant, and when you see a snake with a totally bald head, that is thought to be homozygous.
(In my lavender siblings, the ground color is the light cream color, and the saddle color is the mocha/reddish color)