You are presented with the question "a mutation in the _ of a parent can cause a new trait to appear in the parent 's offspring" and the following answer choices: 
- eggs
 - courtship
 - mitochondria
 - alleles
 - pollen
 - gametes
 - ATP
 - hormones

Now knowing that amutation in the sex cells of a parent can cause a new trait to appear in the parent 's offspring and animals that reproduce sexually produce sex cells, or gametes, choose the best answer.


 

      gametes   