A het is a normal appearing snake that carries one copy of the gene needed to make a recessive morph.
So - a pied (which is recessive) needs two copies of the pied gene to be a visual pied. If a pied is paired with a normal, the resulting offspring all get ONE copy of the pied gene, so they only express themselves as a normal appearing baby, but are 100% het.
You breed 2 100% hets of the same gene to each other - in this case pied, each egg has a 25% chance of receiving a copy of the gene from both parents, resulting in a visible pied.
Buy from a reputable breeder when working with hets, since they appear normal.
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