Insertion or deletion of how many bases will not cause a frameshift mutation?

1.12.2
3.4.Any number

Subtopic:  Mutations and Genetic Code |
 78%
Level 2: 60%+
Hints

If variations arising due to mutation need to spread to the other members of population:
I: the mutation must arise in somatic cells.
II: the mutation must arise in germ cells.
III: the mutation does not seriously impair individual’s ability to have offspring who can transmit the mutation.
 
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic:  DNA Fingerprinting | Mutations and Genetic Code |
 74%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.