Read the passage about mutation in DNA.

MUTATION
Mutation is a process that changes the DNA sequence when a cell is copying its DNA before division. The most common mutation occurs in the bases where a single base can be substituted for another, a base can be deleted, or an extra base is added. The cell is usually able to repair most of the changes.

What happens when change in the DNA is not repaired in a cell that will become an egg or a sperm?


a
the mutation is passed down to the offspring
b
the egg and sperm cells can not produce offspring
c
the mutation remains within the organism, and is not passed down
d
the egg and sperm cells repair the cell during the fertilization process