Maybe a mod can move this to the discussion forum.
To answer your question, heterozygous(het) for a recessive trait means the animal carries only one copy of a recessive gene. Two copies of a recessive gene are needed for the gene to express itself and be visually noticeable. When purchasing hets with the intention of breeding a visual in the future, make sure you are dealing with someone you can trust and can document the animal's genetics.
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