a mutation in a parent's body cell a mutation in a parent's sex cell the natural selection of a trait the artificial selection of a trait
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: What can cause an offspring to have a physical trait neither of its parents has?
Possibilities:
- a mutation in a parent's body cell
- a mutation in a parent's sex cell
- the natural selection of a trait
- the artificial selection of a trait

a mutation in a parent's sex cell