Fact 1: Amutation in the sex cells of a parent can cause a new trait to appear in the parent 's offspring.

Fact 2: Upon reproduction, offspring are subject to mutation.

Given the two facts above, answer the question "What causes new traits because of reproduction?" with the following options: 
- snail
 - mutation
 - animals
 - coded genes
 - gene flow
 - hormones
 - flowers
 - insects


 

  mutation       