Ultraviolent radiation can cause mutations in the dna of skin cells that have been overexposed to the sun. this dna has no effect on future offpring becasue what?

The radiation causing the mutation is changing the persons dna structure within their body, however it cannot be transferred to offspring because the mutation doesn't effect the dna structure of the reproductive cells (Egg or Sperm) which is why the radiation has no effect on the dna of the future offspring

The titanic is the answer