Run-out sentence is a sentence-construction error that occurs when two or more than two independent sentences are not properly connected. In the example, the independent sentences "a phone rang in the concert hall" and "the orchestra stopped playing" were not properly connected, because no connector was used between them. Therefore, the question states an example of a run-out sentence.
An example of incomplete dominance is: A snapdragon flower that is pink as a result of cross-pollination between a red flower and a white flower when neither the white or the red alleles are dominant.<span> </span>