Fact 1: Mutation creates new genetic variation in a gene pool.

Fact 2: Frequency of Mutations Mutations are rare events.

Given the two facts above, answer the question "how frequent are new genetic variations in a gene pool?" with the following options: 
- rare
 - four
 - Summer
 - years
 - CO 2
 - three
 - albino
 - HIV


 

 rare        