Answer the following question given this paragraph: 

Duplications (or amplifications ) lead to multiple copies of a chromosomal region, increasing the number of the genes located within that region. Some genes may be duplicated in their entirety.


Q: What leads to multiple copies of a chromosomal region?

 Choices:

- minimilizations

- gene modification

- subtractions

- duplications (or amplifications )

A:
duplications (or amplifications )
