The above is a good definition of het but you should watch out because many others in the ball python community misuse the term. Heterozygous means having an unmatched pair of genes for whatever trait you are talking about. It does not necessarily mean normal looking gene carrier. It just happens to work out that way with the recessive mutations.

It is also accurate to refer to a heterozygous pastel or spider, they just don't look normal. By understanding co-dominant and dominant hets you can better predict their offspring, especially as more complex crosses are routinely done.

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