Answer the following question: Fact 1: Amutation in the sex cells of a parent can cause a new trait to appear in the parent 's offspring. Fact 2: Traits are initiated by mutation and recombination. Given the two facts above, what changes sex cells?

Pick from:
[a]. copying;
[b]. growth;
[c]. clams;
[d]. mutation;
[e]. coded genes;
[f]. transposing;
[g]. hormones;
[h]. cancer;
Answer:
[d].