Insertion or deletion of how many bases will not cause a frameshift mutation?
| 1. | 1 | 2. | 2 |
| 3. | 3 | 4. | Any number |
| 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 |