Answer the following question given this paragraph: 

Chromosomal alterations are mutations that change chromosome structure. They occur when a section of a chromosome breaks off and rejoins incorrectly or does not rejoin at all. Possible ways these mutations can occur are illustrated in Figure below . Go to this link for a video about chromosomal alterations: http://www. youtube. com/watch?v=OrXRSqa_3lU (2:18).


Q: Chromosomal alterations are mutations that change what?

 Choices:

- Skeleton Structure

- detected structure

- discovery structure

- chromosome structure

A:
chromosome structure
