Final answer:
An individual that carries one copy of a normal chromosome and one copy that contains an inverted segment is described by the term 'inversion'.
Step-by-step explanation:
An individual that carries one copy of a normal chromosome and one copy that contains an inverted segment is described by the term inversion.
An inversion occurs when a chromosome segment breaks, reverses its orientation, and then reattaches in the original position. Inversions can lead to aneuploid gametes if the genes carried on the inverted segment are not oriented correctly.