Question

A certain mutation in the human chromosome number 9 causes part of the chromosome to break and reattach itself in a reverse manner. What kind of mutation is this?

chromosomal duplication
chromosomal inversion
chromosomal deletion

Answer 1

It is Chromosomal Inversion.
An inversion is a chromosome rearrangement in which a segment of a chromosome is reversed end to end. An inversion occurs when a single-chromosome undergoes breakage and rearrangement within itself.