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?
a. chromosomal duplication
b. chromosomal inversion
c. chromosomal deletion

Answer 1

A certain mutation in the human chromosome number 9 that causes part of the chromosome to break and reattach itself in a reverse manner is b. chromosomal inversion. Inversion is a type of mutations in which chromosome segment is inverted end to end. So, there is no change in nucleotide number (no deletions or additions) but chromosomal rearrangement.