Pied is a recessive gene. This means it takes two copies, one from each parent, to reproduce a visual pied. If only one animal is a visual example of the morph, and the other is not carrying the gene, the offspring will get one copy of the gene from the visual parent and no copy from the other. When you breed a Normal to a Pied you will not get any visual Pieds but instead you will get all snakes that look normal. However, each one will be carrying the one copy of the gene from the visual parent.
Now if you grow the offspring up and breed them with another visual Pied, then the odds for each egg are 50/50 for being a visual pied or a non visual snake carrying the pied gene. The reason it is 50/50 is because a Normal het Pied snake carrying only one copy of the Pied gene, could pass the pied gene or it could pass the copy of the normal gene. While the visual Pied will always pass the pied gene as it contains two copies. The eggs that get a copy of the Pied gene from both parents will be visual Pied snakes. The Babies that catch the normal gene from the Het Pied and the Pied gene from the visual parent, will all be non visual but het for Pied.
I hope that helps.
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