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

Fact 2: Animals that reproduce sexually produce sex cells, or gametes.

Given the two facts above, answer the question "a mutation in the _ of a parent can cause a new trait to appear in the parent 's offspring" with the following options: 
- eggs
 - courtship
 - mitochondria
 - alleles
 - pollen
 - gametes
 - ATP
 - hormones


 

      gametes   